County
| FIPS Code [3] | County seat [1][4] | Established [1][4] | Origin
| Etymology [4] | Population [1][5] | Area [1] | Map
|
| Adams County | 001 | Decatur | 01836-02-07 February 7, 1836 | Adams New Purchase | U.S. President John Quincy Adams | &0000000000033625.00000033,625 | &0000000000000339.000000339 sq mi (&0000000000000878.000000878 km2) |  |
| Allen County | 003 | Fort Wayne | 01823-12-12 December 12, 1823 | Delaware New Purchase | Col. John Allen, Kentucky state senator[6] | &0000000000331849.000000331,849 | &0000000000000657.000000657 sq mi (&0000000000001702.0000001,702 km2) |  |
| Bartholomew County | 005 | Columbus | 01821-01-08 January 8, 1821 | Jackson County and Delaware New Purchases | Lt. Col. Joseph Bartholomew[6] | &0000000000071435.00000071,435 | &0000000000000407.000000407 sq mi (&0000000000001054.0000001,054 km2) |  |
| Benton County | 007 | Fowler | 01840-02-18 February 18, 1840 | Jasper County | Thomas H. Benton, U.S. Senator from Missouri | &0000000000009421.0000009,421 | &0000000000000406.000000406 sq mi (&0000000000001052.0000001,052 km2) |  |
| Blackford County | 009 | Hartford City | 01838-02-15 February 15, 1838 | Jay County | Judge Isaac Blackford, Speaker of the Indiana House of Representatives and Chief Justice of the Indiana Supreme Court | &0000000000014048.00000014,048 | &0000000000000165.000000165 sq mi (&0000000000000427.000000427 km2) |  |
| Boone County | 011 | Lebanon | 01830-01-29 January 29, 1830 | Adams and Wabash New Purchases | Frontiersman Daniel Boone | &0000000000046107.00000046,107 | &0000000000000423.000000423 sq mi (&0000000000001096.0000001,096 km2) |  |
| Brown County | 013 | Nashville | 01836-02-03 February 3, 1836 | Bartholomew County Jackson County Monroe County | General Jacob Brown[6] | &0000000000014957.00000014,957 | &0000000000000312.000000312 sq mi (&0000000000000808.000000808 km2) |  |
| Carroll County | 015 | Delphi | 01828-01-17 January 17, 1828 | Adams and Wabash New Purchases | Charles Carroll, signer of the Declaration of Independence | &0000000000020165.00000020,165 | &0000000000000372.000000372 sq mi (&0000000000000963.000000963 km2) |  |
| Cass County | 017 | Logansport | 01828-12-18 December 18, 1828 | Non-county Area | Gen. Lewis Cass, Governor of Michigan Territory and U.S. Secretary of State | &0000000000040930.00000040,930 | &0000000000000413.000000413 sq mi (&0000000000001070.0000001,070 km2) |  |
| Clark County | 019 | Jeffersonville | 01801-02-03 February 3, 1801 | Knox County | General George Rogers Clark | &0000000000096472.00000096,472 | &0000000000000375.000000375 sq mi (&0000000000000971.000000971 km2) |  |
| Clay County | 021 | Brazil | 01825-02-12 February 12, 1825 | Owen County Putnam County Sullivan County Vigo County | U.S. Speaker of the House Henry Clay | &0000000000026556.00000026,556 | &0000000000000358.000000358 sq mi (&0000000000000927.000000927 km2) |  |
| Clinton County | 023 | Frankfort | 01830-01-29 January 29, 1830 | Adams and Wabash New Purchases | DeWitt Clinton, Governor of New York | &0000000000033866.00000033,866 | &0000000000000405.000000405 sq mi (&0000000000001049.0000001,049 km2) |  |
| Crawford County | 025 | English | 01818-01-29 January 29, 1818 | Orange County Harrison County Perry County | Col. William Crawford | &0000000000010743.00000010,743 | &0000000000000306.000000306 sq mi (&0000000000000793.000000793 km2) |  |
| Daviess County | 027 | Washington | 01818-02-02 February 2, 1818 | Knox County | Col. Joseph H. Daviess[6] | &0000000000030820.00000030,820 | &0000000000000431.000000431 sq mi (&0000000000001116.0000001,116 km2) |  |
| Dearborn County | 029 | Lawrenceburg | 01803-03-07 March 7, 1803 | Clark County Hamilton County, OH | U.S. Secretary of War Henry Dearborn | &0000000000046109.00000046,109 | &0000000000000305.000000305 sq mi (&0000000000000790.000000790 km2) |  |
| Decatur County | 031 | Greensburg | 01821-12-12 December 12, 1821 | Delaware New Purchase | Commodore Stephen Decatur | &0000000000024555.00000024,555 | &0000000000000373.000000373 sq mi (&0000000000000966.000000966 km2) |  |
| DeKalb County | 033 | Auburn | 01835-02-07 February 7, 1835 | Non-county Area | Johann de Kalb | &0000000000040285.00000040,285 | &0000000000000363.000000363 sq mi (&0000000000000940.000000940 km2) |  |
| Delaware County | 035 | Muncie | 01827-01-26 January 26, 1827[7] | Delaware New Purchase | Delaware Native American people | &0000000000118769.000000118,769 | &0000000000000393.000000393 sq mi (&0000000000001018.0000001,018 km2) |  |
| Dubois County | 037 | Jasper | 01817-12-20 December 20, 1817 | Perry County Pike County | Toussaint Dubois[6] | &0000000000039674.00000039,674 | &0000000000000430.000000430 sq mi (&0000000000001114.0000001,114 km2) |  |
| Elkhart County | 039 | Goshen | 01830-01-29 January 29, 1830 | Non-county Area | Elkhart Native American people | &0000000000182791.000000182,791 | &0000000000000464.000000464 sq mi (&0000000000001202.0000001,202 km2) |  |
| Fayette County | 041 | Connersville | 01818-01-29 January 29, 1818 | Franklin Wayne County and Non-county Area | Marquis de la Fayette | &0000000000025588.00000025,588 | &0000000000000215.000000215 sq mi (&0000000000000557.000000557 km2) |  |
| Floyd County | 043 | New Albany | 01819-01-02 January 2, 1819 | Clark and Harrison Counties | Col. John Floyd, early settler Davis Floyd[6] or early settler John Floyd | &0000000000078823.00000078,823 | &0000000000000148.000000148 sq mi (&0000000000000383.000000383 km2) |  |
| Fountain County | 045 | Covington | 01825-12-20 December 20, 1825 | Montgomery County and Wabash New Purchase | Maj. James Fontaine | &0000000000017954.00000017,954 | &0000000000000396.000000396 sq mi (&0000000000001026.0000001,026 km2) |  |
| Franklin County | 047 | Brookville | 01811-02-01 February 1, 1811 | Clark County Dearborn County Knox County | Founding father Benjamin Franklin | &0000000000022151.00000022,151 | &0000000000000386.000000386 sq mi (&0000000000001000.0000001,000 km2) |  |
| Fulton County | 049 | Rochester | 01836-02-07 February 7, 1836 | Non-county Area | Robert Fulton, inventor of the steamboat | &0000000000020511.00000020,511 | &0000000000000368.000000368 sq mi (&0000000000000953.000000953 km2) |  |
| Gibson County | 051 | Princeton | 01813-04-01 April 1, 1813 | Knox County | John Gibson, secretary of the Indiana Territory[6] | &0000000000038700.00000038,700 | &0000000000000526.000000526 sq mi (&0000000000001362.0000001,362 km2) |  |
| Grant County | 053 | Marion | 01831-02-10 February 10, 1831 | Formed from Madison County, Adams New Purchase and un-organized | Captains Samuel and Moses Grant | &0000000000073403.00000073,403 | &0000000000000414.000000414 sq mi (&0000000000001072.0000001,072 km2) |  |
| Greene County | 055 | Bloomfield | 01821-01-05 January 5, 1821 | Sullivan County Non-county Area | Gen. Nathanael Greene | &0000000000032157.00000032,157 | &0000000000000522.000000522 sq mi (&0000000000001352.0000001,352 km2) |  |
| Hamilton County | 057 | Noblesville | 01823-01-08 January 8, 1823 | Formed from Delaware New Purchase | Alexander Hamilton | &0000000000255740.000000255,740 | &0000000000000388.000000388 sq mi (&0000000000001005.0000001,005 km2) |  |
| Hancock County | 059 | Greenfield | 01828-01-26 January 26, 1828 | Formed from Madison County | John Hancock | &0000000000055391.00000055,391 | &0000000000000306.000000306 sq mi (&0000000000000793.000000793 km2) |  |
| Harrison County | 061 | Corydon | 01808-12-01 December 1, 1808 | Formed from Clark and Knox County | William Henry Harrison, governor of Indiana Territory and U.S. President | &0000000000034325.00000034,325 | &0000000000000485.000000485 sq mi (&0000000000001256.0000001,256 km2) |  |
| Hendricks County | 063 | Danville | 01824-12-20 December 20, 1824 | Formed from Delaware and Wabash New Purchase | Governor of Indiana William Hendricks[6] | &0000000000104093.000000104,093 | &0000000000000408.000000408 sq mi (&0000000000001057.0000001,057 km2) |  |
| Henry County | 065 | New Castle | 01821-12-31 December 31, 1821 | Formed from Delaware New Purchase | Patrick Henry | &0000000000048508.00000048,508 | &0000000000000393.000000393 sq mi (&0000000000001018.0000001,018 km2) |  |
| Howard County | 067 | Kokomo | 01844-01-15 January 15, 1844[8] | Formed from un-organized | Gen. Tilghman Howard, a U.S. Representative from Indiana | &0000000000084964.00000084,964 | &0000000000000293.000000293 sq mi (&0000000000000759.000000759 km2) |  |
| Huntington County | 069 | Huntington | 01832-02-02 February 2, 1832 | Formed from Adams New Purchase and un-organized | Samuel Huntington, signer the Declaration of Independence | &0000000000038075.00000038,075 | &0000000000000383.000000383 sq mi (&0000000000000992.000000992 km2) |  |
| Jackson County | 071 | Brownstown | 01816-01-01 January 1, 1816 | Formed from Clark, Jefferson and Washington | U.S. President Andrew Jackson | &0000000000041335.00000041,335 | &0000000000000509.000000509 sq mi (&0000000000001318.0000001,318 km2) |  |
| Jasper County | 073 | Rensselaer | 01835-02-07 February 7, 1835 | Formed from Wabash New Purchase | Sgt. William Jasper | &0000000000030043.00000030,043 | &0000000000000560.000000560 sq mi (&0000000000001450.0000001,450 km2) |  |
| Jay County | 075 | Portland | 01835-02-07 February 7, 1835 | Formed from Adams New Purchase | John Jay, first Chief Justice of the United States Supreme Court | &0000000000021806.00000021,806 | &0000000000000384.000000384 sq mi (&0000000000000995.000000995 km2) |  |
| Jefferson County | 077 | Madison | 01810-11-23 November 23, 1810 | Formed from Clark, Dearborn and Knox County | U.S. President Thomas Jefferson | &0000000000031705.00000031,705 | &0000000000000361.000000361 sq mi (&0000000000000935.000000935 km2) |  |
| Jennings County | 079 | Vernon | 01816-12-27 December 27, 1816 | Formed from Jackson and Jefferson Counties | Jonathan Jennings, the first Governor of Indiana | &0000000000027554.00000027,554 | &0000000000000377.000000377 sq mi (&0000000000000976.000000976 km2) |  |
| Johnson County | 081 | Franklin | 01823-12-31 December 31, 1823 | Formed from Delaware New Purchase | John Johnson, first Chief Justice of the Indiana Supreme Court | &0000000000115209.000000115,209 | &0000000000000320.000000320 sq mi (&0000000000000829.000000829 km2) |  |
| Knox County | 083 | Vincennes | 01790-06-06 June 6, 1790 | Original County | U.S. Secretary of War Henry Knox | &0000000000039256.00000039,256 | &0000000000000516.000000516 sq mi (&0000000000001336.0000001,336 km2) |  |
| Kosciusko County | 085 | Warsaw | 01835-02-07 February 7, 1835 | Formed from un-organized | Tadeusz Kościuszko | &0000000000074057.00000074,057 | &0000000000000538.000000538 sq mi (&0000000000001393.0000001,393 km2) |  |
| LaGrange County | 087 | LaGrange | 01832-02-02 February 2, 1832 | Formed from un-organized | The Marquis de la Fayette's home outside of Paris, France | &0000000000034909.00000034,909 | &0000000000000387.000000387 sq mi (&0000000000001002.0000001,002 km2) |  |
| Lake County | 089 | Crown Point | 01837-01-28 January 28, 1837 | Formed from Newton and Porter Counties | Its location on Lake Michigan | &0000000000484564.000000484,564 | &0000000000000380.000000380 sq mi (&0000000000000984.000000984 km2) |  |
| LaPorte County | 091 | LaPorte | 01832-01-29 January 29, 1832 | Formed from St. Joseph and un-organized | LaPorte means the door or the port in French | &0000000000110106.000000110,106 | &0000000000000497.000000497 sq mi (&0000000000001287.0000001,287 km2) |  |
| Lawrence County | 093 | Bedford | 01818-01-07 January 7, 1818 | Formed from Orange | Capt. James Lawrence[6] | &0000000000045922.00000045,922 | &0000000000000449.000000449 sq mi (&0000000000001163.0000001,163 km2) |  |
| Madison County | 095 | Anderson | 01823-01-04 January 4, 1823 | Formed from Delaware New Purchase | U.S. President James Madison | &0000000000133358.000000133,358 | &0000000000000452.000000452 sq mi (&0000000000001171.0000001,171 km2) |  |
| Marion County | 097 | Indianapolis | 01821-12-31 December 31, 1821 | Formed from Delaware New Purchase | Gen. Francis Marion | &0000000000860454.000000860,454 | &0000000000000396.000000396 sq mi (&0000000000001026.0000001,026 km2) |  |
| Marshall County | 099 | Plymouth | 01835-02-07 February 7, 1835 | Formed from St. Joseph County | U.S. Chief Justice John Marshall | &0000000000045128.00000045,128 | &0000000000000444.000000444 sq mi (&0000000000001150.0000001,150 km2) |  |
| Martin County | 101 | Shoals | 01820-01-17 January 17, 1820 | Formed from Daviess and Dubois Counties | Maj. John T. Martin | &0000000000010369.00000010,369 | &0000000000000336.000000336 sq mi (&0000000000000870.000000870 km2) |  |
| Miami County | 103 | Peru | 01833-01-30 January 30, 1833 | Formed from Cass County and un-organized | Miami Native American people | &0000000000036082.00000036,082 | &0000000000000376.000000376 sq mi (&0000000000000974.000000974 km2) |  |
| Monroe County | 105 | Bloomington | 01818-01-14 January 14, 1818 | Formed from Orange County | U.S. President James Monroe | &0000000000120563.000000120,563 | &0000000000000394.000000394 sq mi (&0000000000001020.0000001,020 km2) |  |
| Montgomery County | 107 | Crawfordsville | 01822-12-21 December 21, 1822 | Formed from Wabash New Purchase | Gen. Richard Montgomery | &0000000000037629.00000037,629 | &0000000000000505.000000505 sq mi (&0000000000001308.0000001,308 km2) |  |
| Morgan County | 109 | Martinsville | 01822-12-31 December 31, 1822 | Formed from Delaware and Wabash New Purchase | Gen. Daniel Morgan | &0000000000066689.00000066,689 | &0000000000000406.000000406 sq mi (&0000000000001052.0000001,052 km2) |  |
| Newton County | 111 | Kentland | 01859-12-08 December 8, 1859[9] | Formed from Jasper County | Sgt. John Newton | &0000000000014566.00000014,566 | &0000000000000402.000000402 sq mi (&0000000000001041.0000001,041 km2) |  |
| Noble County | 113 | Albion | 01835-02-07 February 7, 1835 | Formed from un-organized | U.S. Senator James Noble or Governor of Indiana Noah Noble, brothers | &0000000000046275.00000046,275 | &0000000000000411.000000411 sq mi (&0000000000001064.0000001,064 km2) |  |
| Ohio County | 115 | Rising Sun | 01844-01-04 January 4, 1844 | Formed from Dearborn County | The Ohio River | &0000000000005623.0000005,623 | &0000000000000087.00000087 sq mi (&0000000000000225.000000225 km2) |  |
| Orange County | 117 | Paoli | 01816-02-01 February 1, 1816 | Formed from Gibson, Knox and Washington | Orange County, North Carolina, in turn named for the Dutch Protestant House of Orange | &0000000000019306.00000019,306 | &0000000000000400.000000400 sq mi (&0000000000001036.0000001,036 km2) |  |
| Owen County | 119 | Spencer | 01818-12-21 December 21, 1818 | Formed from Daviess and Sullivan County | Abraham Owen[6] | &0000000000021786.00000021,786 | &0000000000000385.000000385 sq mi (&0000000000000997.000000997 km2) |  |
| Parke County | 121 | Rockville | 01821-01-09 January 9, 1821 | Formed from Vigo County | Benjamin Parke, a delegate of Indiana Territory to the U.S. Congress[6] | &0000000000017241.00000017,241 | &0000000000000445.000000445 sq mi (&0000000000001153.0000001,153 km2) |  |
| Perry County | 123 | Tell City | 01814-11-01 November 1, 1814 | Formed from Gibson and Warrick Counties | Commodore Oliver Hazard Perry | &0000000000018899.00000018,899 | &0000000000000381.000000381 sq mi (&0000000000000987.000000987 km2) |  |
| Pike County | 125 | Petersburg | 01816-12-21 December 21, 1816 | Formed from Gibson and Perry County | Zebulon M. Pike | &0000000000012837.00000012,837 | &0000000000000336.000000336 sq mi (&0000000000000870.000000870 km2) |  |
| Porter County | 127 | Valparaiso | 01835-02-07 February 7, 1835 | Formed from un-organized | Capt. David Porter | &0000000000146798.000000146,798 | &0000000000000418.000000418 sq mi (&0000000000001083.0000001,083 km2) |  |
| Posey County | 129 | Mount Vernon | 01814-11-11 November 11, 1814 | Formed from Warrick County | Thomas Posey, governor of Indiana Territory | &0000000000027061.00000027,061 | &0000000000000408.000000408 sq mi (&0000000000001057.0000001,057 km2) |  |
| Pulaski County | 131 | Winamac | 01835-02-07 February 7, 1835 | Formed from un-organized | Kazimierz Pułaski | &0000000000013755.00000013,755 | &0000000000000434.000000434 sq mi (&0000000000001124.0000001,124 km2) |  |
| Putnam County | 133 | Greencastle | 01822-12-31 December 31, 1822 | Formed from Owen County and Wabash New Purchase | Gen. Israel Putnam | &0000000000036019.00000036,019 | &0000000000000480.000000480 sq mi (&0000000000001243.0000001,243 km2) |  |
| Randolph County | 135 | Winchester | 01818-01-10 January 10, 1818 | Formed from Wayne County | Either Thomas Randolph[6] | &0000000000027401.00000027,401 | &0000000000000453.000000453 sq mi (&0000000000001173.0000001,173 km2) |  |
| Ripley County | 137 | Versailles | 01816-12-27 December 27, 1816 | Formed from Dearborn and Jefferson County | Gen. Eleazer Wheelock Ripley | &0000000000026523.00000026,523 | &0000000000000446.000000446 sq mi (&0000000000001155.0000001,155 km2) |  |
| Rush County | 139 | Rushville | 01821-12-31 December 31, 1821 | Formed from Delaware New Purchase | Dr. Benjamin Rush, signer the Declaration of Independence | &0000000000018261.00000018,261 | &0000000000000408.000000408 sq mi (&0000000000001057.0000001,057 km2) |  |
| St. Joseph County | 141 | South Bend | 01830-01-29 January 29, 1830 | Formed from un-organized | St. Joseph River, which flows through it toward Lake Michigan | &0000000000301559.000000301,559 | &0000000000000457.000000457 sq mi (&0000000000001184.0000001,184 km2) |  |
| Scott County | 143 | Scottsburg | 01820-01-12 January 12, 1820 | Formed from Clark, Jefferson, Jennings and Washington Counties | Charles Scott, Governor of Kentucky | &0000000000022960.00000022,960 | &0000000000000190.000000190 sq mi (&0000000000000492.000000492 km2) |  |
| Shelby County | 145 | Shelbyville | 01821-12-31 December 31, 1821 | Formed from Delaware New Purchase | Gen. Isaac Shelby, Governor of Kentucky | &0000000000043445.00000043,445 | &0000000000000413.000000413 sq mi (&0000000000001070.0000001,070 km2) |  |
| Spencer County | 147 | Rockport | 01818-01-10 January 10, 1818 | Formed from Perry and Warrick Counties | Capt. Spier Spencer[6] | &0000000000020391.00000020,391 | &0000000000000399.000000399 sq mi (&0000000000001033.0000001,033 km2) |  |
| Starke County | 149 | Knox | 01835-02-07 February 7, 1835 | Formed from St. Joseph County and un-organized | Gen. John Stark | &0000000000023556.00000023,556 | &0000000000000309.000000309 sq mi (&0000000000000800.000000800 km2) |  |
| Steuben County | 151 | Angola | 01837-02-07 February 7, 1837 | Formed from un-organized | Baron Frederick von Steuben | &0000000000033214.00000033,214 | &0000000000000309.000000309 sq mi (&0000000000000800.000000800 km2) |  |
| Sullivan County | 153 | Sullivan | 01816-12-30 December 30, 1816 | Formed from Knox | Daniel Sullivan, soldier | &0000000000021751.00000021,751 | &0000000000000447.000000447 sq mi (&0000000000001158.0000001,158 km2) |  |
| Switzerland County | 155 | Vevay | 01814-10-01 October 1, 1814 | Formed from Dearborn and Jefferson County | The home country of many of the early settlers, Switzerland | &0000000000009065.0000009,065 | &0000000000000221.000000221 sq mi (&0000000000000572.000000572 km2) |  |
| Tippecanoe County | 157 | Lafayette | 01826-01-20 January 20, 1826 | Formed from Wabash New Purchase and un-organized | The Tippecanoe River and the Battle of Tippecanoe | &0000000000148955.000000148,955 | &0000000000000500.000000500 sq mi (&0000000000001295.0000001,295 km2) |  |
| Tipton County | 159 | Tipton | 01844-01-15 January 15, 1844 | Formed from Adams New Purchase and un-organized | John Tipton[6] | &0000000000016577.00000016,577 | &0000000000000260.000000260 sq mi (&0000000000000673.000000673 km2) |  |
| Union County | 161 | Liberty | 01821-01-05 January 5, 1821 | Parts of Fayette, Franklin and Wayne counties | Union of parts of other counties | &0000000000007349.0000007,349 | &0000000000000162.000000162 sq mi (&0000000000000420.000000420 km2) |  |
| Vanderburgh County | 163 | Evansville | 01818-01-07 January 7, 1818 | Gibson County Posey County Warrick County | Henry Vanderburgh, a judge for Indiana Territory | &0000000000188922.000000188,922 | &0000000000000235.000000235 sq mi (&0000000000000609.000000609 km2) |  |
| Vermillion County | 165 | Newport | 01824-01-02 January 2, 1824 | Formed from Parke County and Wasbash New Purchase | The Vermillion River | &0000000000016788.00000016,788 | &0000000000000257.000000257 sq mi (&0000000000000666.000000666 km2) |  |
| Vigo County | 167 | Terre Haute | 01818-01-21 January 21, 1818 | Formed from Sullivan County | Francis Vigo | &0000000000105848.000000105,848 | &0000000000000403.000000403 sq mi (&0000000000001044.0000001,044 km2) |  |
| Wabash County | 169 | Wabash | 01833-01-30 January 30, 1833[10] | Formed from Adams New Purchase and un-organized | The Wabash River | &0000000000034960.00000034,960 | &0000000000000413.000000413 sq mi (&0000000000001070.0000001,070 km2) |  |
| Warren County | 171 | Williamsport | 01827-01-19 January 19, 1827 | Formed from Wabash New Purchase and un-organized | Dr. Joseph Warren | &0000000000008419.0000008,419 | &0000000000000365.000000365 sq mi (&0000000000000945.000000945 km2) |  |
| Warrick County | 173 | Boonville | 01813-04-30 April 30, 1813 | Knox County | Capt. Jacob Warrick[6] | &0000000000060010.00000060,010 | &0000000000000384.000000384 sq mi (&0000000000000995.000000995 km2) |  |
| Washington County | 175 | Salem | 01813-12-21 December 21, 1813 | Clark, Harrison and Knox Counties | U.S. President George Washington | &0000000000027223.00000027,223 | &0000000000000514.000000514 sq mi (&0000000000001331.0000001,331 km2) |  |
| Wayne County | 177 | Richmond | 01810-11-27 November 27, 1810 | Formed from Clark, Dearborn and Knox | Gen. "Mad" Anthony Wayne | &0000000000071097.00000071,097 | &0000000000000404.000000404 sq mi (&0000000000001046.0000001,046 km2) |  |
| Wells County | 179 | Bluffton | 01837-02-07 February 7, 1837 | Formed from Adams New Purchase | Capt. William A. Wells | &0000000000027600.00000027,600 | &0000000000000370.000000370 sq mi (&0000000000000958.000000958 km2) |  |
| White County | 181 | Monticello | 01834-02-01 February 1, 1834 | Formed from Wabash New Purchase and un-organized | Capt. Isaac White[6] | &0000000000025267.00000025,267 | &0000000000000505.000000505 sq mi (&0000000000001308.0000001,308 km2) |  |
| Whitley County | 183 | Columbia City | 01835-02-07 February 7, 1835 | Formed from un-organized | Col. William Whitley[6] | &0000000000030707.00000030,707 | &0000000000000336.000000336 sq mi (&0000000000000870.000000870 km2) |  |