The station has one low-level side platform to the west of the tracks, long enough for one door of one car to receive and discharge passengers.

The station is owned and operated by the Connecticut Department of Transportation, but Metro-North is responsible for maintaining platform lighting as well as trash and snow removal.

[1] A small parking lot is managed by the town of Seymour.

[5] As of 2024[update], the state plans to add an accessible high-level platform at the station, with construction to take place from 2025 to 2027.

[6] Media related to Seymour station at Wikimedia Commons This Connecticut train station-related article is a stub.