| O | ||||
| O M Pettit | Civil War | Unknown | ||
| Ocala | YTB 805 | Stricken 2000 / Sold to McAllister Towing, Renamed Beth M. Mc Allister | ||
| Oconostota | YT 375 | YTB 375 | YTM 375 | Decom 1946, Scrapped 1962 |
| Ocmulgee | YTB 532 | YTBM 532 | Stricken 1977, Sold | |
| Okumuglee | YTB 765 | Stricken 2003 / Sold to McAllister Towing of Virginia 2006 | ||
| Olathe | YTM 273 | Ex YT / YTB / YTM 273 Tecumseh / Stricket to the US Air Force 6/1/1975 | ||
| Oneka | YNT 3 | YTB 729 | Stricken 1963 | |
| Oneonta | WW 1 | Unknown | ||
| Oneyana | YT 262 | YTB 262 | YTM 262 | Decom 1962, Stricken 1962 |
| Onockatin | YT 277 | YTB 277 | Stricken 1960 | |
| Ontatio | WW 1 | AT 13 | Unknown | |
| Opelika | YTB 798 | Active in Japan | ||
| Ora | WW 1 | Unknown | ||
| Oratamin | YT 347 | YTB 347 | YTM 347 | Stricken 1969, Sold 1970 |
| Orono | YT 190 | YTB 190 | YTM 190 | Striken 1975 to Guyana |
| Osamekin | YT 191 | YTB 191 | Sunk Dec. 4 1945 Alaska | |
| Osegatchie | YTB 515 | YTM 778 | Decom 1946, Stricken 1965 to Venezuela | |
| Osceola | WW 1 | AT 47 | Unknown | |
| Osceola | YT 129 | YTB 129 | YTM 129 | Stricken 1973 |
| Oshkosh | YTB 757 | Stricken 1996, Sold to Action Marine | ||
| Ossahinta | YT 278 | YTB 278 | Decom 1960, Stricken 1960 | |
| Oswegatchie | YTB 515 | YTM 778 | Stricken 1965 to Venezuela | |
| Otokomi | YT 400 | YTB 400 | YTM 400 | Stricken 1986, Sold / Scrapped 3/2/87 |
| Ottumwa | YTB 761 | Stricken 2002 | ||
| Owachomo | YT 401 | YTB 401 | YTM 401 | Decom 1946, Stricken 1974 |
| Owera | WW 1 | Unknown | ||
| Ozette | YTB 541 | YTM 541 | Stricken 1973 | |
| P | ||||
| Paducah | YTB 758 | Stricken 2001, Sold 2001 to Thames TowBoat Co., Renamed "Patricia Ann | ||
| Palatka | YTB 801 | Stricken 2001, Sold to Boston Towing, Renamed Maverick | ||
| Palos | Civil War | Unknown | ||
| Panameta | YT 402 | YTB 402 | YTM 402 | Stricken 1977 / Sunk as Target 9/4/77 |
| Pansy | Civil War | Unknown | ||
| Passaic | WW 1 | YT 20 | Ex Right Arm / Stricken 1921 / Sold 1922 | |
| Petalesharo | YTB 832 | To Reserve Fleet 1999, Italy, Inactive | ||
| Patapsco | WW 1 | AT 10 | Unknown | |
| Patuxent | WW 1 | AT 11 | Unknown | |
| Pawhuska | YTB 822 | Stricken 2002 / sold to Cashman Scrap and Salvage 2005 | ||
| Pawnee | WW 1 | YT 21 | Ex John Dwight / Stricken 1922 / Sold | |
| Pawtucket | WW 1 | YT 7 | YTM 7 | Decom 1946, Sold |
| Pawtucket | YT 359 | YTB 359 | YTM 359 | Decom 1946, Stricken 1986 |
| Pequawet | YTB 705 | Cancelled, Not Commisioned | ||
| Penacock | WW 1 | YT 6 | YTM 6 | Decom 1945, Sold 1947 |
| Penacook | YT 279 | YTB 279 | Stricken 1971 | |
| Pennsylva R.R. No.9 | WW 1 | Unknown | ||
| Penobscot | WW 1 | YT 42 | Unknown | |
| Pentucket | WW 1 | YT 8 | Decom 1933, Sreicken 1936 | |
| Peoria | WW 1 | AT 48 | YT 109 | Decom 1921, Stricken 1922 |
| Periwinkle | Civil War | Unknown | ||
| Peshewah | YT 281 | YTB 281 | Decom 1956, Stricken 1956 | |
| Pessacus | YT 192 | YTB 192 | YTM 192 | Decom 1962, Stricken 1965 |
| Petalesharo | YTB832 | Stricken 07/20/07 / La Maddalena, Italy | ||
| Picqua | YTB 739 | Unknown | ||
| Pilgrim | Civil War | Unknown | ||
| Pink | Civil War | Unknown | ||
| Pinta | Civil War | Unknown | ||
| Piomingo | YT 282 | YTB 282 | Decom 1962, Stricken 1962 | |
| Piqua | YTB 793 | Stricken 2001, Sold to McAllister Towing, Renamed Ellen McAllister | ||
| Piscataqua | WW 1 | AT 49 | Unknown | |
| Pitamkan | YT 403 | YTB 403 | YTM 403 | Decom 1946, Stricken 1980 |
| Pitchlynn | YT 283 | YTB 283 | Decom 1960, stricken 1960 | |
| Pocahontas | Civil War | Unknown | ||
| Pocahontas | WW 1 | Chemung | Unknown | |
| Pocahontas | YT 266 | YTB 266 | YTM 266 | Stricken 1972, Sold / Renamed Sea Lark |
| Pocasset | YTB 516 | YTM 779 | Decom 1946, Stricken 1985 | |
| Pocomoke | WW 1 | SP 265 | YT 43 | Stricken 1922 |
| Pogatacut | YT 267 | YTB 267 | YTM 267 | Decom 1947, Stricken 1970 |
| Pokagon | YT 274 | YTB 274 | Sunk Sept. 27, 1947 off Florida | |
| Pokagon | YTB 746 | YTM 746 | Decom 1964, Sold | |
| Pokagon | YTB 836 | Active in Bremerton, WA. | ||
| Pokanoket | YTB 517 | YTM 762 | To Viet Nam 1972 | |
| Ponkabia | YT 411 | YTB 411 | Sunk Oct. 4, 1945 Okinawa | |
| Pontiac | YTB 756 | Stricken 2000, Sold 2000 to McAllister Towing, Renamed Kaleen McAllister | ||
| Pontiac | WW 1 | YT 20 | Decom 1921, Sold 1922 | |
| Poppy | Civil War | Unknown | ||
| Poquim | YT 285 | YTB 285 | Sunk Jan 8, 1949, San Deigo | |
| Port Fire | Civil War | Unknown | ||
| Port Hollywood | YTL 718 | Returned to Owner 1947 | ||
| Portobago | YT 413 | YTB 413 | YTM 413 | Stricken 1985, Sold |
| Potomac | WW 1 | AT 50 | Unknown | |
| Poughkeepsie | YTB 813 | Stricken 4/26/06 in Pearl Harbor / Up for Sale by DRMS 12/17/2007 | ||
| Powhatan | WW 1 | Cayunga | YT 12 | Decom 1928, Sold 1928 |
| Primrose | Civil War | Unknown | ||
| Progressive | WW 1 | Unknown | ||
| Protector | WW1 | Returned to Owner 1919 | ||
| Pushmataha | YTB 830 | Stricken 1995 | ||
| Putnam | Civil War | Unknown | ||