| L | ||||
| Laburnum | Civil War | Unknown | ||
| Lakspur | Civil War | Unknown | ||
| Laurel | Civil War | Unknown | ||
| Lavender | Civil War | Unknown | ||
| Lelaka | YTB 514 | YTM 777 | Decom 1946, Stricken 1979 | |
| Leslie | Civil War | Unknown | ||
| Leyden | Civil War | WW1 | Unknown | |
| Lilac | Civil War | Unknown | ||
| Lily | Civil War | Unknown | ||
| Linda | Civil War | Unknown | ||
| Little Brothers | WW 1 | Unknown | ||
| Little Sisters | WW 1 | Unknown | ||
| Lively | WW 1 | YT 14 | Decom 1926, Stricken 1929 | |
| Lively | YT 14 | YT 323 | YTM 323 | Ex-Active / Stricken 1945 to Owner |
| Lone Wolf | YT 179 | YTB 179 | Lost Dec. 10 1946 | |
| Lonoto | YT 407 | YTB 407 | YTM 407 | Stricken 1973, Sold |
| Lowell | WW 1 | Unknown | ||
| Lucille Ross | WW 1 | Unknown | ||
| Lupin | Civil War | Unknown | ||
| Lykens | WW 1 | AT 56 | Unknown | |
| M | ||||
| Madokawando | YT 180 | YTB 180 | YTM 180 | Stricken to US Army 1983 |
| Mahackemo | YT 223 | YTB 223 | Lost Sept. 11, 1948 North Carolina | |
| Mahaska | YNT 730 | YTB 730 | YTM 730 | Stricken 1970, Sold |
| Mahoa | YTB 519 | YTM 519 | Stricken 1977 / Sunk as Target 4/1/1978 | |
| Mahopac | WW 1 | AT 29 | Unknown | |
| Makah | YTB 509 | YTM 772 | Stricken 1971, Sold | |
| Malvern | WW 1 | Stricken 1919 | ||
| Mamo | YT 325 | YTM 325 | YTB 325 | Decom 1945, Stricken 1946 |
| Manada | YT 224 | YTB 224 | Decom 1954, Stricken 1954 | |
| Mandan | YTB 794 | Stricken 2002 to SINKEX, Sunk as target | ||
| Manhattan | YTB 779 | YTZ 1 | Re-Acquired by the US Navy and re-activated to Active Service in Bangor WA. | |
| Manistee | YT 173 | YTB 173 | Stricken 1946 | |
| Manistee | YTB 782 | Active in Japan | ||
| Mankato | YNT 8 | YTM 734 | Stricken 1978, Sunk | |
| Manuawi | YTB 16 | Stricken 1954 | ||
| Maquinna | YT 225 | YTB 225 | Stricken 1946 | |
| Maria | Civil War | Unknown | ||
| Marigold | Civil War | Unknown | ||
| Marin | YTB 753 | Stricken 1991 / Sold | ||
| Mariner | WW 1 | Stricken 1919 | ||
| Mariner | WW 1 | Ex Jack Scully / To US ACOE | ||
| Marinette | YTB 791 | Sold to Savannah Marine Services INC. 2006 | ||
| Martin | Civil War | Unknown | ||
| Mascoutah | YTB 772 | YTM 760 | Stricken 1986 | |
| Massapequa | YTB 807 | Active in Japan | ||
| Massasoit | WW 1 | YT 15 | Decom 1931, Stricken 1936 / Ex WW1 A. W. Booth | |
| Massasoit | YT 131 | YTM 131 | Stricken 1972 / Sold 1973 | |
| Matunak | YTB 548 | YTM 548 | Decom 1946, Stricken 1985 | |
| Mauvila | YT 328 | YTB 328 | YTM 328 | Stricken 1963 |
| Mawkaw | YT 182 | YTB 182 | YTM 182 | Decom 1946, Stricken 1972 |
| Mayflower | Civil War | Unknown | ||
| Mazapeta | YT 181 | YTB 181 | YTM 181 | Decom 1947, Stricken 1975 |
| McDougall | WW 1 | Unknown | ||
| Mecosta | YT 392 | YTB 392 | YTM 392 | Stricken 1980, Sold |
| Mecosta | YTB 818 | To Reserve Fleet 1997 / Stricken 2003 | ||
| Menasha | YTB 773 | YTM 761 | Stricken 1986 | |
| Menatonon | YT 254 | YTB 254 | Decom 1960, Stricken 1960 | |
| Mendota | WW 1 | Muscotah | YT 33 | Ex Concord / Decom 1934, Stricken 1934 |
| Menhaden | WW 1 | Stricken 1919 | ||
| Menominee | YTB 790 | Stricken 2000, Sold to Al Johnson, Cleveland, OH / Abandoned | ||
| Menoquet | YT 256 | YTB 256 | Stricken 1959 | |
| Mercedes | WW 1 | YT 108 | Stricken 1942, Sunk Jan 2, 1942 (Cavite) | |
| Metacom | YNT 19 | YTB 740 | Decom 1946, Stricken 1947 | |
| Metacom | YTB 829 | Stricken 2001 to US Army Corps of Engineers, Cleveland / Renamed Demolen | ||
| Migadan | YTB 549 | YTM 549 | Stricken 1987 to USAF | |
| Mignonette | Civil War | Unknown | ||
| Mimac | YTB 507 | YTM 770 | Stricken 1985, Sold | |
| Minnehaha | YT 271 | YTM 271 | YTM 271 | Stricken 1946 to Maritime Commision / Sold |
| Minniska | YT 408 | YTB 408 | YTM 408 | Stricken 1975, Sold |
| Minooka | YT 257 | YTB 257 | Stricken 1947 | |
| Mishawaka | YTB 764 | Stricken 2002 / Up for sale in March, 2005 by DRMS | ||
| Mistletoe | Civil War | Unknown | ||
| Mizar | LT 2077 | YTM 759 | To IX 505, 1975 | |
| Moanahonga | YT 258 | YTB 258 | YTM 258 | Decom 1964, Stricken 1965 |
| Moccasin | Civil War | Unknown | ||
| Modoc | WW 1 | YT 16 | YTL 16 | Stricken 1946 to Maritime Commision |
| Mohave | WW 1 | AT 15 | Unknown | |
| Mohawk | WW 1 | YT 17 | YTL 17 | To WSA 1946 / Ex Thomas P. Fowler / Transferred 1946 |
| Montauk | WW 1 | Unknown | ||
| Monterey | Civil War | Unknown | ||
| Montezuma | YT 145 | YTB 145 | YTM 145 | Decom 1946, Sold 1974 to Saunders Towboat, Portland OR. |
| Moratoc | YTB 704 | Stricken 1985 / Sold | ||
| Muscotah | WW 1 | YT 33 | Mendota | Ex Concord / Decom 1934, Stricken 1934 |
| Muskegon | YTB 763 | Active in Japan | ||
| Myrtle | Civil War | Unknown | ||