The station is the point where the New Haven Line's Danbury Branch connects to the Northeast Corridor, as well as a peak-hour terminal for some express trains.

The station has two high-level side platforms, each 10 cars long, that serve the outer tracks of the four-track Northeast Corridor.

The New York side's station building consists of a small waiting area with a gigantic glass arch, overlooking the tracks.

The service was provided for one year from a federal grant received from the "One Coast, One Future" initiative designed to help economic development in Stamford, Norwalk and Bridgeport.

As part of the replacement the stairways that used to provide pedestrian access to either platform from Monroe Street were removed along with concealment of the original red sandstone abutments behind steel reinforced concrete facings.

On June 24, 2002, South Norwalk was added as an eastbound stop for one morning Shore Line East originating at Stamford.

[8][9] One Shore Line East round trip resumed serving Stamford on October 7, 2024, but did not stop at South Norwalk.