Sigi (disambiguation)
- Dogon religion
- Marjorie Lynette Sigley
- Prince Sigismund of Prussia (1864–1866)
- Siegfried Grabner
- Siegmund Nissel
- Sigi
- Sigi Feigel
- Sigi Holzbauer
- Sigi Lens
- Sigi Regency
- Sigi Renz
- Sigi River
- Sigi Rothemund
- Sigi Schmid
- Sigi Ziering
- Sigrid Burger
- Sigurður
- Social Institutions and Gender Index
- Space Integrated GPS/INS