This article contains a list of named passenger trains in the United States, with names beginning I through M. | Train Name | Railroad | Train Endpoints | Operated | | Illini | Illinois Central | Chicago, IL-Champaign, IL | | | Illini Service | Amtrak | Chicago, IL-Carbondale, IL | | | Illinois Zephyr | Amtrak and Chicago, Burlington & Quincy | Chicago, IL-Quincy, IL | | | Indianapolis Express | New York Central | Detroit, MI-Indianapolis, IN | | | Inter-American | Amtrak | St. Louis, MO-Laredo, TX | 1974- | | Inter-City Limited | Grand Trunk Western and Canadian National | Chicago, IL-Toronto, ON | | | International Limited | Amtrak and VIA | Chicago, IL-Toronto, ON | 1982-2004 | | International | Great Northern | Seattle, WA-Vancouver, BC | 1950-1971 | | Interstate Express | New York Central | Chicago, IL-Toledo, OH | | | Interstate Express | Reading-CNJ-Lackawanna | Philadelphia, PA-Syracuse, NY | | | Iron & Copper Country Express | Chicago and North Western Railway | Chicago, IL-Ishpeming, MI | | | Iroquois | New York Central | Chicago, IL-Toledo, OH | | | Train Name | Railroad | Train Endpoints | Operated | | James Whitcomb Riley | New York Central C&O(1941-1971)
Amtrak(1971-1977) | Chicago, IL-Washington, DC
Chicago, IL-Newport News, VA | 1941-1977 | | Jeffersonian | Pennsylvania | New York, NY-St Louis, MO | | | Jet Rocket | Rock Island | Chicago, IL-Peoria, IL | 1956- | | John Quincy Adams | New Haven Railroad | New York, NY-Boston, MA | 1957- | | Juniata | Penn Central | New York City-Pittsburgh, PA | -1971 | | Train Name | Railroad | Train Endpoints | Operated | | Kansas City-Florida Special | St. Louis-San Francisco-Southern-Atlantic Coast Line-Florida East Coast | Kansas City, MO-Miami, FL | 1902-1965 | | Kansas City Mule | Amtrak | St. Louis, MO-Kansas City, MO | ?-2009 | | Kansas City Zephyr | Chicago, Burlington & Quincy | Chicago, IL-Kansas City, MO | 1953-1968 | | Kansas Cityan | Santa Fe | Chicago, IL-Kansas City, MO | 1938- | | Katy Flyer | Katy | Kansas City, MO - San Antonio, TX | | | Katy Limited | Katy | Kansas City, MO - San Antonio, TX | | | Kentucky Cardinal | Illinois Central | Louisville, KY - Memphis, TN | | | Kentucky Cardinal | Amtrak | Chicago, IL - Louisville, KY | 1999-2003 | | Keystone Service | Amtrak | New York, NY-Harrisburg, PA | | | Keystone | Pennsylvania | New York, NY-Washington, DC | 1956- | | Knickerbocker | New York Central | New York, NY-Boston, MA | | | Train Name | Railroad | Train Endpoints | Operated | | La Salle | CN; VIA | Chicago, IL-Toronto, ON;Sarnia, ON-Montreal, QC | | | Lake Cities | Erie Lackawanna | Chicago, IL-Hoboken, NJ | 1947-1970 | | Lake Cities | Amtrak | Chicago, IL-Toledo (1980-1995)
Chicago, IL-Pontiac, MI (1995-2004) | 1980-2004 | | Lake Cities Special | New York Central | Detroit, MI-Pittsburgh, PA | | | Lake Country Limited | Amtrak | Chicago, IL-Janesville, WI | 2000-2001 | | Lake Shore Limited | Amtrak | Chicago, IL-New York, NY/Boston, MA | | | Lake Shore Limited | New York Central | Chicago, IL-Toledo, OH | | | Lake Superior Limited | Duluth, South Shore & Atlantic | Calumet, MI-St. Ignace, MI | | | Laker | Soo Line | Chicago, IL–Superior-Duluth / Minneapolis-St. Paul | June 1951 to January 1965 | | Land O' Corn | Illinois Central | Chicago, IL–Waterloo, IA | 1941? to August 5, 1967 | | Lark | Southern Pacific | San Francisco, CA-Los Angeles, CA | 1940-1968 | | LaSalle | Amtrak | Chicago, IL-Milwaukee, WI | 1980-1989 | | Lehigh Express | Grand Trunk Western | New York, New York-Chicago, IL | | | Legislator | Penn Central/Amtrak | Washington, D.C.-New York City | -1971 | | Liberty Bell | Amtrak | Philadelphia-New York City | | | Liberty Express | Amtrak | Philadelphia-Boston, MA | 1979-? | | Lincoln Service | Amtrak | Chicago, IL-St. Louis, MO | 2006-present | | Lone Star | St. Louis Southwestern | Memphis, TN-Dallas, TX | -1952 | | Lone Star | Amtrak | Chicago, IL-Dallas, TX
Chicago, IL-Houston, TX | 1974-1979 | | Loop | Amtrak | Chicago, IL-Springfield, IL | -1996 | | Train Name | Railroad | Train Endpoints | Operated | | Mainstreeter | Northern Pacific (1952–1970),
Burlington Northern (1970–1971) | Chicago, IL–Seattle, WA (1952–1970),
St. Paul, MN – Seattle, WA (1970–1971) | | | Man O' War | Central of Georgia | Atlanta, GA-Columbus, GA | 1947-1970 | | Manitoba Express | Minneapolis, St. Paul and Sault Ste. Marie Railway and
Canadian Pacific Railway | St. Paul, MN – Winnipeg, MB | 1904–1909 | | Maple Leaf | VIA/Amtrak | New York, NY-Toronto, ON | | | Mark Twain Zephyr | Chicago, Burlington & Quincy | Hannibal, MO - St. Louis, MO | | | Marquette | Pere Marquette | Chicago, IL-Grand Rapids, MI | | | Marylander | Baltimore and Ohio Railroad, Reading Railroad,Central Railroad of New Jersey | Washington, DC-New York, NY | ?-1956 | | Maumee | New York Central | Chicago, IL-Toledo, OH | | | Meadowlark | Chicago & Eastern Illinois | Chicago, IL-Cypress, IL | 1946- | | Memphian | St. Louis-San Francisco | St. Louis, MO-Memphis, TN | 1925-1958 | | Merchants Limited | New Haven Railroad | New York City (Grand Central Terminal) - Boston, MA | | | Mercury | New York Central | Detroit, MI-Cleveland, OH
Detroit, MI-Chicago, IL | 1936-1939
1939- | | Meteor | St. Louis-San Francisco Railway | | | | Meteor | Sacramento Northern Railway | | | | Metroliner | Penn Central (1968-1971)
Amtrak (1971-2006) | New York, NY-Washington, DC | 1968-2006 | | Metropolitan Special | Baltimore and Ohio Railroad | Washington, DC-St. Louis, MO | ?-1971 | | Michigan | New York Central | Chicago, IL-Detroit, MI | | | Michigan Central Limited | Michigan Central | New York City-Chicago, IL | | | Michigan Executive | Amtrak | Detroit, MI-Jackson, MI | | | Michigan Special | New York Central | Detroit, MI-Cincinnati, OH | | | Mid-City Express | Pennsylvania and Wabash | Chicago, IL-Detroit, MI | | | Midnight Special | Gulf, Mobile & Ohio | Chicago, IL-St. Louis, MO | -1971 | | Midnight Sun | Alaska Railroad | Anchorage, AK-Fairbanks, AK | | | Midwest Hiawatha | Milwaukee Road | Chicago, IL-Omaha, NE | 1942- | | Minute Man | Boston & Maine | Boston, MA-Washington, DC | | | Missouri River Eagle | Missouri Pacific | St. Louis, MO-Omaha, NE | 1940-1971 | | Missouri River Runner | Amtrak | St. Louis, Missouri-Kansas City, Missouri | 2009- | | Missourian | New York Central | St. Louis, MO-Cleveland, OH | | | Mohawk | Grand Trunk Western | Chicago, IL-Detroit, MI | | | Mohawk | New York Central | Chicago, IL-Toledo, OH | | | Montrealer/Washingtonian | Boston & Maine,Pennsylvania, Central Vermont Railway,New Haven Railroad(1836-1965)
Amtrak(1972-1987) | Washington, DC-Montreal, PQ | | | Morning Daylight | Southern Pacific | | 1941- | | Morning Flyer | Grand Rapids & Indiana | Chicago, IL-Grand Rapids, MI | | | Morning Star | St. Louis Southwestern | St. Louis, MO-Dallas, TX
Memphis, TN-Dallas, TX | 1941- | | Morning Hiawatha | Milwaukee Road | Chicago, IL-St. Paul, MN | 1939-1971 | | Motor City Special | New York Central | Chicago, IL-Detroit, MI | | | Motor Queen | New York Central | Detroit, MI-Cincinnati, OH | | | Mound City | Illinois Terminal Railroad | | | | Mountaineer | | Chicago, IL-Norfolk, VA | | | Mount Rainier | | Seattle, Washington-Portland, Oregon | | | Murray Hill | New Haven Railroad | New York, NY (Grand Central Terminal) - Boston, Massachusetts | | |
