The 1927–28 Slovenian Republic League was the ninth season of the Slovenian Republic League. Primorje have won the league for the first time after defeating I. SSK Maribor 2–1 in the final.[1] The Football Association of Ljubljana later repeal the match, and in the replay, I. SSK Maribor won the game 2–1.[1] However, the Football Association of Yugoslavia repeal the replayed match and confirmed Primorje as the champions.[1]