The Cambridge to Mildenhall railway is a closed railway between Cambridge and Mildenhall in England. It was built by the Great Eastern Railway, and opened in two stages, in 1884 and 1885.
Traversing thinly populated agricultural terrain, it was not heavily used. The GER introduced cost-saving measures on passenger trains, including push and pull trains and a conductor-guard system, and in 1922 opened three very basic lineside halts.
The passenger service on the line was discontinued in 1962 and, except for a short stub at Barnwell Junction, the line was closed completely in 1965. There is no railway use of the former route now.