Sada as a surname may refer to:
- Daniel Sada (born 1953), Mexican writer
- Eugenio Garza Sada (1892-1973), Mexican businessman and philanthropist
- Georges Sada (born 1939?), Iraqi author and statesman
- Masashi Sada (born 1952), Japanese folk singer
- Musa Mohammed Sada (born 1957), Nigerian politician
- Sotaro Sada (born 1984), Japanese football player
- Shigeri Sada (born 1954), Japanese football player
- Tokuhei Sada (1909-1933), Japanese swimmer
- Víctor Sada (born 1984), Spanish basketball player
- Sada or Sadha (born 1984), Indian actress
Sada as a place may refer to:
- Şada, Azerbaijan
- Sada, Mayotte, France
- Sada, Shimane, Japan
- Sada, Galicia, Spain
- Sada, Navarre, Spain
- Sada, now Waddams Grove, Illinois, United States
- Sa'dah Governorate, Yemen
SADA as initials may refer to:
- South Australian Debating Association