| Train Name |
Railroad |
Train Endpoints |
Operated |
| Mail Express |
New Haven Railroad (????–1970); Amtrak (1971-????) |
Washington, DC - Boston, MA |
|
| 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 |
| Manhattan Limited |
Pennsylvania Railroad |
Chicago, IL – New York |
|
| Manitoba Express |
Minneapolis, St. Paul and Sault Ste. Marie Railway and Canadian Pacific Railway |
St. Paul, MN – Winnipeg, MB |
1904–1909 |
| Maple Leaf[1] |
Grand Trunk Western Railroad and Canadian National |
Chicago, IL (Dearborn Station) – Toronto, ON |
1927–1971 |
| Maple Leaf |
Via/Amtrak |
New York, NY – Toronto, ON |
|
| Maple Leaf |
Lehigh Valley, and Canadian National |
New York, NY – Toronto, ON |
|
| Marathon |
Missouri Pacific |
Kansas City, MO – Omaha, NE |
|
| Mark Twain Zephyr |
Chicago, Burlington & Quincy |
Hannibal, MO – St. Louis, MO |
|
| Marquette |
Milwaukee Road |
Chicago, IL – Mason City, IA |
|
| Marquette |
Pere Marquette |
Chicago, IL – Grand Rapids, MI |
|
| Mayflower |
New York, New Haven and Hartford Railroad |
Boston-New York City |
|
| Marylander |
Baltimore and Ohio Railroad, Reading Railroad, and 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 |
1946–1962 |
| Memphian |
St. Louis-San Francisco |
St. Louis, MO – Memphis, TN |
1925–1958 |
| Memphis-Californian |
Rock Island |
Memphis, TN – Los Angeles, CA |
1923–1949 |
| Merchants Limited |
|
New York City – Boston, MA |
1903–1995 |
| Mercury |
New York Central |
Detroit, MI – Cleveland, OH (1936–1939) Detroit, MI – Chicago, IL (1939–) |
1936– |
| Meteor |
St. Louis-San Francisco Railway |
St. Louis, MO-Oklahoma City, OK |
|
| 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 |
|
| Midlander |
Erie |
Chicago, IL – Jersey City, NJ |
1939–1947 |
| Midnight Special |
Chicago & Alton, later Gulf, Mobile & Ohio |
Chicago, IL – St. Louis, MO |
–1971 |
| Midnight Sun |
Alaska Railroad |
Anchorage, Alaska – Fairbanks, Alaska |
|
| Midwest Hiawatha |
Milwaukee Road |
Chicago, IL – Omaha, NE |
1940–1956 |
| Minnesota 400 |
Chicago & North Western |
Mankato, MN–Wyeville, WI |
1936–1950 |
| Minnesota Marquette |
Milwaukee Road |
Chicago, IL – Austin, MN |
|
| Minnesotan |
Chicago Great Western |
Chicago, IL – Minneapolis - St. Paul, MN |
|
| Minute Man |
Boston and Maine |
Boston, MA – Troy, Maine [3] |
|
| Minute Man |
Amtrak [4][5] |
Boston, MA – Philadelphia, PA (1972 - 1973)
Boston - Washington, DC (1973 - 1995) |
|
| Missionary |
Santa Fe |
Chicago, IL-Kansas City, MO |
|
| Missouri River Eagle |
Missouri Pacific |
St. Louis, MO – Omaha, NE |
1940–1971 |
| Missouri River Runner |
Amtrak |
St. Louis, MO – Kansas City, MO |
2009– |
| Missourian |
Missouri Pacific |
St. Louis, MO – Kansas City, MO |
|
| Missourian |
New York Central |
St. Louis, MO – New York City |
|
| Mohawk |
Grand Trunk Western |
Chicago, IL – Detroit, MI |
1967–1971 |
| Mohawk |
New York Central |
Chicago, IL – Toledo, OH |
|
| Montrealer[6] |
Pennsylvania Railroad, New Haven, Boston & Maine, Central Vermont, and Canadian National |
Washington, DC – Montreal, PQ |
1836–1965 |
| Montrealer |
Amtrak |
Washington, DC – Montreal, PQ |
1972–1987 |
| Montreal Limited |
Delaware & Hudson, New York Central |
New York, NY – Montreal, PQ |
|
| Morning Daylight |
Southern Pacific |
Los Angeles - San Francisco, CA |
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 Steeler |
Pennsylvania |
Pittsburgh, PA–Cleveland, OH |
1950–1957 |
| 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 |
St. Louis, MO – Peoria, IL |
1949–1956 |
| Mountaineer |
Minneapolis, St. Paul and Sault Ste. Marie Railway |
Chicago, IL – Vancouver, BC, later Minneapolis - St. Paul, MN – Vancouver, BC |
|
| Mountaineer |
Maine Central and Boston & Maine |
Boston, MA – Conway, NH |
|
| Mountaineer |
Amtrak |
Chicago, IL – Norfolk, VA |
|
| Mount Rainier |
|
Seattle, WA – Portland, OR |
|
| Mount Royal |
New York Central, Boston & Maine, Rutland, and Canadian National |
New York, NY – Montreal, PQ |
ca.1900-1953 |
| Murray Hill |
New Haven Railroad |
New York, NY (Grand Central Terminal) – Boston, MA |
|