The 2015–16 South West Peninsula League season was the ninth in the history of the South West Peninsula League, a football competition in England, that feeds the Premier Division of the Western Football League.
[1] In the event, Okehampton Argyle accepted relegation without participating in a playoff.
The Premier Division featured 20 teams, the same as the previous season, after Bovey Tracey were relegated to Division One East, and Elmore resigned mid-season.
Two new clubs joined the league: Division One East featured 18 clubs, the same as the previous season, after Tavistock were promoted to the Premier Division, Plymstock United were transferred to Division One West and two new clubs joined: Division One West featured 17 clubs, increased from 16 the previous season, after Helston Athletic were promoted to the Premier Division, Perranporth resigned from the league and three new clubs joined: Clubs must achieve the necessary ground grading, and finish in the top three of their league.
The following clubs have applied for promotion to Division One East and West for next season: