Oulton Broad South railway station (originally Carlton Colville) is on the East Suffolk Line in the east of England, and is one of two stations serving Oulton Broad, Suffolk.

Oulton Broad South is the next station along from Lowestoft on the line to Ipswich, and from Lowestoft the line crosses Mutford Bridge with a view of Lake Lothing to the east and Oulton Broad Lake to the west.

The station is 115 miles 42 chains (185.9 km) measured from London Liverpool Street via Ipswich.

This line also served the Kirkley goods depot adjacent to Beaconsfield Road and the Fen Park.

As of December 2019[update] the typical Monday-Sunday off-peak service at Oulton Broad South is as follows: Trains extending to and from London Liverpool Street were withdrawn in 2010.