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 | [1] | ||||
| 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 | |||||
| 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 | |||||
| 27 November | ||||||
| 29 November | ||||||
| 4 December | ||||||
| 7 December | Lend-Lease acquisition, former | |||||
| 9 December | ||||||
| 15 December | ||||||
| 15 December | ||||||
| 21 December | ||||||
| 22 December | Lend-Lease acquisition, former | |||||
| 28 December | ||||||
| 31 December | Lend-Lease acquisition, former |