List of ship commissionings in 1942
The list of ship commissionings in 1942 includes a chronological list of ships commissioned in 1942. In cases where no official commissioning ceremony was held, the date of service entry may be used instead.
| Date | Operator | Ship | Class and type | Notes |
| March 2 | ' | ex-Rio Hudson | ||
| March 2 | ' | ex-Rio Parana | ||
| March 3 | ' | ex-Rio de la Plata | ||
| March 4 | ' | under command of Commander Orville F. Gregor | ||
| March 20 | ' | |||
| March | ' | Wreck dispersal vessel | ex- | |
| April 30 | ' | |||
| May 1 | ' | Completion date | ||
| May 12 | ' | Patrol yacht | ex-Ramfis | |
| May 12 | ' | |||
| June 3 | ' | Landing Ship, Infantry | ex- for Southern Railway, requisitioned on completion | |
| June 15 | ' | ex-Steel Architect | ||
| June 22 | ' | |||
| July 1 | ' | ex-Rio de Janeiro | ||
| August 9 | ' | sloop | SG 1 | |
| August 16 | ' | |||
| August 20 | ' | |||
| August 21 | ' | recommissioned after conversion | ||
| August 25 | ' | recommissioned after conversion | ||
| August 29 | ' | |||
| August 31 | ' | |||
| September 7 | ' | sloop | SG 2 | |
| September 15 | ' | |||
| September 19 | ' | recommissioned after conversion | ||
| September 24 | ' | recommissioned after conversion | ||
| September 26 | ' | ex-Steel Advocate | ||
| September 30 | ' | ex-, acquired through Lend-Lease | ||
| November 2 | ' | sloop | SG 3 | |
| November 8 | ' | |||
| November 15 | ' | ex-, acquired through Lend-Lease | ||
| November 22 | ' | completion date | ||
| 12 December | ' | |||
| December 21 | ' | ex-, acquired through Lend-Lease | ||
| December 10 | ' | |||
| December 31 | ' | |||
| December | ' | completion date | ||
| unknown date | Weather ship | WBS 6 |