SIPO
- Chironius
- Entandrophragma
- Entandrophragma utile
- Estonian Security Police and SD
- SerDes
- Shift register
- Sicherheitspolizei
- Sipo (footballer)
- Sipoo
- Sipos (disambiguation)
- South Island oystercatcher
- Standards in Public Office Commission
- State Intellectual Property Office
- State Intellectual Property Office (Croatia)