| Train Name
| Railroad
| Train Endpoints
| Operated
|
| Mainstreeter
| Northern Pacific
| Chicago, IL-Seattle, WA
| 1952-?
|
| Man O\' War
| Central of Georgia
| Atlanta, GA-Columbus, GA
| 1947-1970
|
| 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, MA-Washington, DC
|
|
| Missouri River Eagle
| Missouri Pacific
| St. Louis, MO-Omaha, NE
| 1940-1971
|
| 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
| Central Vermont Amtrak
| 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-
|
| 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
|
|