| Q | ||||
| Quileute | YTB 540 | YTM 540 | Stricken 1973 | |
| Quinnapin | YT 286 | YTB 286 | Decom 1950, Stricken 1950 | |
| R | ||||
| R.W.Wilmont | WW 1 | Unknown | ||
| Rapido | WW 1 | Unknown | ||
| Red Cloud | YT 268 | YTB 268 | YTM 268 | Stricken 1986, Sold |
| Redwing | YTB 783 | Stricken 2003 | ||
| Relief | WW 1 | Returned to Owner 1919 | ||
| Rescue | WW 1 | Unknown | ||
| Resolute | Civil War | Unknown | ||
| Resolute | WW 1 | #1 | Ex Sara McW | |
| Resolute | WW 1 | #2 | Unknown | |
| Rickwood | WW 1 | Unknown | ||
| Robert Henjes | YT 464 | YTM 464 | Unknown | |
| Rocket | WW 1 | YT 22 | Decom 1931, Stricken 1931 | |
| Rocket | Civil War | Unknown | ||
| Rose | Civil War | Unknown | ||
| Roselle | WW 1 | Unknown | ||
| S | ||||
| S.M. Goucher | WW 1 | Unknown | ||
| S.T. Co. No. 2 | WW 1 | Unknown | ||
| Sabeata | YT 287 | YTB 287 | YTM 763 | Decom 1965, Stricken 1972 |
| Sachem | Civil War | Unknown | ||
| Saco | YTB 796 | Stricken 2004 / Scrapped | ||
| Saco | WW 1 | YT 31 | Ex Alexander Brown / Stricken 1926 | |
| SadieRoss | WW 1 | Unknown | ||
| Saffron | Civil War | Unknown | ||
| Sagamore | Civil War | Unknown | ||
| Sagamore | WW 1 | AT 20 | Unknown | |
| Sagawamick | YTB 522 | YTM 522 | Decom 1947, Stricken 1982 | |
| Saguanash | YT 288 | YTB 288 | Lost Nov. 7, 1946, Washington | |
| Sakarissa | YT 269 | YTB 269 | YTM 269 | Decom 1971, Stricken 1974 |
| Sakaweston | YT 289 | YTB 289 | Decom 1956, Sold 1960 | |
| Samoset | WW 1 | YT 5 | Unknown | |
| Sampson | Civil War | Unknown | ||
| San Felipe | WW 1 | Unknown | ||
| Sanpoil | YTB 707 | Cancelled 1945 | ||
| Santana | YT 270 | YTB 270 | YTM 270 | Stricken 1975, Sold |
| Santaquin | YTB 824 | Active in Norfolk, VA. | ||
| Sassaba | YT 364 | YTB 364 | YTM 364 | Stricken 1986, Sold |
| Sassacus | YT 193 | YTB 193 | YTM 193 | Decom 1946, Stricken 1963 |
| Satago | YT 414 | YTB 414 | YTM 414 | Stricken 1976, Sunk 1977 |
| Satanta | YT 270 | YTB 270 | YTM 270 | Stricken 1975, Sold to Rick Hamborg, Seattle, WA. Renamed Maris Pearl |
| Satellite | Civil War | |||
| Saugus | YTB 780 | Stricken 2000, Sold, Renamed Ocean Eagle | ||
| Sciota | WW 1 | AT 30 | Unknown | |
| Sea Rover | WW 1 | AT 57 | Unknown | |
| Sebago | WW 1 | YT 23 | Ex Hortense / Stricken 1936 | |
| Sebeata | YTB 287 | YTM 763 | Stricken 1972 | |
| Secota | YT 415 | YTB 415 | YTM 415 | Sunk in Collision 1986, Midway |
| Segwarusa | YT 365 | YTB 365 | YTM 365 | Decom 1973, Stricken 1974 |
| Seminole | WW1 | Unknown | ||
| Senasqua | YTB 523 | YTM 523 | Stricken 1982, Sold | |
| Setauket | YTB 708 | Cancelled 1945 | ||
| Shahoka | YT 368 | YTB 386 | YTM 386 | Sunk June 1, 1944 (Pacific) |
| Shabonee | YT 465 | YTB 465 | Decom 1945, Stricken 1945 | |
| Shabonee | YTB 833 | Stricken 2002, Sold to McAllister Towing / Renamed Daniel McAllister | ||
| Shahaska | YTB 533 | YTM 533 | Decom 1946, Stricken 1975 | |
| Shamokin | YT 369 | YTB 369 | YTM 369 | Decom 1971, Stricken 1972 |
| Shamokin | YTB752 | To Kewaunee | ||
| Shamokin | YT 369 | YTB 369 | YTM 369 | Stricken 1972 to DRMS for Scrapping |
| Shawsheen | Civil War | Unknown | ||
| Shenandoah | WW 1 | Choptank | YT 36 | To YTM 36. Stricken 1946, To WSA 1947 / Ex Francis B. Hackett / Renamed Choptank |
| Sikis | YTB 539 | YTM 539 | Decom 1947, Stricken 1974 | |
| Sioux | WW 1 | Nyack | YT 19 | Ex P. H. Wise / Renamed Nyack / Sold 1921 |
| Sister | WW 1 | Unknown | ||
| Skandawati | YT 370 | YTB 370 | YTM 370 | Decom 1970, Stricken 1973 |
| Skenandoa | YTB 835 | Active in Bremerton, WA. | ||
| Smohalla | YT 371 | YTB 371 | YTM 371 | Decom 1946, Stricken 1975 |
| Snowdrop | Civil War | Unknown | ||
| Sonnicant | YT 416 | YTB 416 | YTM 416 | Stricken 1972 / Sold |
| Sonoma | WW 1 | AT 12 | Unknown | |
| Sorrel | Civil War | Unknown | ||
| Sotoyomo | WW 1 | YT 9 | YTM 9 | Decom 1945, Scuttled 1946 |
| Spartan | WW 1 | Unknown | ||
| Speedwell | Civil War | Unknown | ||
| Spitfire | Civil War | Unknown | ||
| Squanto | YT 194 | YTB 194 | YTM 194 | Decom 1962, Stricken 1963 |
| Standish | Civil War | Unknown | ||
| Standish | WW 1 | Unknown | ||
| Stars & Stripes | Civil War | Unknown | ||
| Stephen W. McKeever | WW 1 | Unknown | ||
| Sunnadin | WW 1 | Tug # 28 | AT 28 | Unknown |
| Swatane | YT 344 | YTB 344 | YTM 344 | Decom 1962, Stricken 1963 |
| Sweet Briar | Civil War | Unknown | ||