Coordinates: 21°41′05″S 51°04′24″W / 21.68472°S 51.07333°W / -21.68472; -51.07333 Adamantina is a Brazilian city located in the northwest of the state of São Paulo.
- Founded: 1948
- Elevation: 401 m
- Population: 34,218 inhabitants (update: 2004 IBGE Census)
- Area: 411.78 km²
- Population density: 81.17 hab/km²
- Postal code: 17800-000