List of ship commissionings in 1943
The list of ship commissionings in 1943 includes a chronological list of ships commissioned in 1943. 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 | Ref |
| 9 January | ' | Lend-Lease acquisition, former | |||
| 13 January | ' | sloop | |||
| 14 January | ' | ||||
| 31 January | ' | Lend-Lease acquisition | |||
| 17 February | ' | ||||
| 20 February | ' | ||||
| 22 February | ' | ||||
| 25 February | ' | ||||
| 27 February | ' | Lend-Lease acquisition, former | |||
| 1 March | ' | sloop | |||
| 8 March | ' | ||||
| 31 March | ' | ||||
| 1 April | ' | sloop | |||
| 7 April | ' | Lend-Lease acquisition | |||
| 9 April | ' | Lend-Lease acquisition, former | |||
| 9 April | ' | ||||
| 10 April | ' | ||||
| 12 April | ' | ||||
| 15 April | ' | ||||
| 23 April | ' | at Boston Navy Yard under command of Commander Chester E. Carroll | |||
| 25 April | ' | Lend-Lease acquisition | |||
| 28 April | ' | ||||
| 28 April | ' | Lend-Lease acquisition, former | |||
| 5 May | MTB 345 | torpedo boat | transferred from the Royal Navy | ||
| 12 May | ' | sloop | modified | ||
| 13 May | ' | ||||
| 23 May | ' | ||||
| 24 May | ' | ||||
| 28 May | ' | ||||
| 31 May | ' | ||||
| 8 June | ' | modified | |||
| 9 June | ' | ||||
| 11 June | ' | Lend-Lease acquisition, former | |||
| 17 June | ' | ||||
| 28 June | ' | ||||
| 3 July | ' | ||||
| 8 July | ' | ||||
| 19 July | ' | Lend-Lease acquisition, former | |||
| 22 July | ' | ||||
| 24 July | ' | ||||
| 1 August | ' | Lend-Lease acquisition, former | |||
| 4 August | ' | Lend-Lease acquisition, former | |||
| 6 August | ' | Lend-Lease acquisition, former | |||
| 7 August | ' | ||||
| 11 August | ' | Lend-Lease acquisition, former | |||
| 12 August | ' | Lend-Lease acquisition, former | |||
| 12 August | ' | Lend-Lease acquisition, former | |||
| 16 August | ' | ||||
| 17 August | ' | ||||
| 25 August | ' | Lend-Lease acquisition, former | |||
| 27 August | ' | ||||
| 30 August | ' | sloop | modified | ||
| 31 August | ' | ||||
| 31 August | ' | ||||
| 2 September | Schnelles Geleitboot 4 | sloop | |||
| 7 September | ' | Lend-Lease acquisition, former | |||
| 13 September | ' | ||||
| 25 September | ' | ||||
| 27 September | ' | Lend-Lease acquisition, former | |||
| 29 September | ' | ||||
| 5 October | ' | ||||
| 14 October | ' | ||||
| 22 October | ' | Lend-Lease acquisition, former | |||
| 23 October | ' | ||||
| 31 October | ' | ||||
| 2 November | ' | sloop | modified | ||
| 3 November | ' | Lend-Lease acquisition, former | |||
| 7 November | ' | ||||
| 8 November | ' | Lend-Lease acquisition, former | |||
| 15 November | ' | ||||
| 19 November | ' | Lend-Lease acquisition, former | |||
| 20 November | ' | Lend-Lease acquisition, former | |||
| 21 November | ' | Former | |||
| 25 November | ' | ||||
| 27 November | ' | ||||
| 29 November | ' | ||||
| 4 December | ' | ||||
| 7 December | ' | Lend-Lease acquisition, former | |||
| 9 December | ' | ||||
| 15 December | ' | ||||
| 15 December | ' | ||||
| 16 December | ' | ||||
| 21 December | ' | ||||
| 22 December | ' | Lend-Lease acquisition, former | |||
| 28 December | ' | ||||
| 31 December | ' | Lend-Lease acquisition, former |