Clapton railway station is on a suburban line operated by 'one' located on Upper Clapton Road.

It links Upper Clapton to Liverpool Street in central London, and to Hertford East and Enfield Town further north. Trains generally run every fifteen minutes. Clapton is on the branch of the Lee Valley lines that separates into Tottenham Hale or St James Street. It joins up with the Seven Sisters branch at Hackney Downs .

Clapton is in both Travelcard Zone 2 and Travelcard Zone 3.