The following is a list of all commuter rail systems in the United States, ranked by ridership. All figures come from the American Public Transit Association's Ridership Reports Statistics^[1] for the second quarter of 2009, unless otherwise noted. Dates are given for all figures; the most recent available are used.

Rank	System	Largest city served	Ridership (average weekday)	Date	Ridership per mile	Route miles	Opened	Notes
1	MTA Long Island Rail Road	New York	347,600	Q2 2009	497	700	1836	[2]
2	Metra	Chicago	311,900	Q2 2009	630	495	1984	[3]
3	MTA Metro-North Railroad	New York	278,700	Q2 2009	726	384	1983	[4]
4	New Jersey Transit rail operations	New York	276,000	FY 2007	290	951	1983	[5][6]
5	MBTA Commuter Rail	Boston	145,300	Q2 2009	395	368	1973	[7]
6	SEPTA Regional Rail	Philadelphia	117,700	Q2 2009	407	289	1983
7	Metrolink	Los Angeles	41,900	Q2 2009	82	512	1992	[8]
8	Caltrain	San Francisco and San Jose	39,600	Q2 2009	514	77	1987	[9][10]
9	MARC	Baltimore and Washington DC	32,000	Q2 2009	171	187	1984
10	Virginia Railway Express	Washington DC	15,700	Q2 2009	174	90	1992
11	SFRTA Tri-Rail	Miami	13,100	Q2 2009	182	72	1987	[11][12]
12	NICTD South Shore Line	Chicago	13,100	Q2 2009	146	90	1903	[13]
13	Sounder Commuter Rail	Seattle / Tacoma	9,300	Q2 2009	116	80	2000
14	Trinity Railway Express	Dallas and Fort Worth	9,300	Q2 2009	274	34	1996
15	NCTD Coaster	San Diego	4,900	Q2 2009	119	41.1	1995
16	New Mexico Rail Runner Express	Albuquerque	4,200	Q2 2009	43	97	2006
17	UTA FrontRunner	Salt Lake City	4,100	Q2 2009	93	44	2008
18	Altamont Commuter Express	San Jose	2,800	Q2 2009	36	86	1998
19	Shore Line East	New Haven	2,000	Q2 2009	34	59	1990
20	Westside Express Service	Beaverton	1,200	Q2 2009	80	15	2009
21	Music City Star	Nashville	600	Q2 2009	19	32	2006

[edit] Notes

[edit] See also

• Commuter rail
• Commuter rail in North America
• Public transportation
• List of United States light rail systems by ridership
• List of United States rapid transit systems by ridership
• List of United States local bus agencies by ridership