The 2023–24 South West Peninsula League season was the 17th in the history of the South West Peninsula League, a football competition in England, that feeds the Premier Division of the Western Football League. The league was formed in 2007 from the merger of the Devon County League and the South Western League and, with the exceptions of Bishops Lydeard in Somerset and Bridport in Dorset, features clubs based in Cornwall and Devon. The two divisions of the South West Peninsula League are on the same level of the National League System as the Western League Division One (Step 6).
The constitution was announced on 15 May 2023.[1]
| Competition: | South West Peninsula League |
| Winners: | Ivybridge Town |
| Promoted: | Ivybridge Town |
| Prevseason: | 2022–23 |
| Nextseason: | 2024–25 |
Premier Division East featured 17 teams, reduced from 19 the previous season, after Brixham were promoted to the Western League Premier Division; Holsworthy were transferred to Premier Division West, and Plymouth Marjon and Elmore were relegated.
Two clubs joined the division:
| Competition: | South West Peninsula League |
| Promoted: | AFC St Austell |
| Prevseason: | 2022–23 |
| Nextseason: | 2024–25 |
Premier Division West featured 17 teams, the same as the previous season, after St Blazey were promoted to the Western League Premier Division, and Godolphin Atlantic (Newquay) folded.
Two clubs joined the division: