SJD can refer to:
- Kildin Sámi, a language spoken on the Kola peninsula (ISO 639-3 language code
sjd) - Sir John Deanes, a sixth form college in Northwich, England
- SJD (musician) (Sean James Donnelly), a musician from New Zealand
- Doctor of Juridical Science (S.J.D.), a doctorate degree
- The IATA airport code for Los Cabos International Airport which serves San José del Cabo and Cabo San Lucas, Mexico
- Socialist Janata (Democratic), a political party in India