Southbridge or South Bridge may refer to:
Locations
;New Zealand
- Southbridge, New Zealand
- Southbridge Branch, New Zealand, a railway line
- Southbridge District High School
- Southbridge Primary School
;United Kingdom
- South Bridge, Edinburgh
;United States
- Southbridge, Massachusetts
- Southbridge Municipal Airport
- Southbridge, Virginia
- Southbridge Towers, Manhattan, New York
- John Harris Bridge, Harrisburg, Pennsylvania, known locally as "South Bridge"
- Gateway Bridge (Illinois–Iowa), Clinton, Iowa, also known as “South Bridge”
Other uses
- Southbridge (computing), a chip that implements the "slower" capabilities of the motherboard