SJP may stand for:
- St. John's Preparatory School (Danvers, Massachusetts), a secondary school
- Saint John's Preparatory School (Collegeville, Minnesota), a secondary school
- Saint Joseph's Preparatory School, a secondary school in Philadelphia, Pennsylvania
- St. James's Park, Exeter City Football Club's home stadium
- St James' Park, Newcastle United Football Club's home stadium
- St. James's Place Wealth Management Group, a UK-based business
- Students for Justice in Palestine, a US-based student movement
- St John Plessington Catholic College
- Sheldon J. Plankton, also known as Plankton, character in SpongeBob SquarePants
- Sarah Jessica Parker, actress
- Scottish Jacobite Party, a political party in Scotland
- Sacroilliatic joint pain, also called Sacroiliac joint dysfunction