Gillingham was a constituency represented in the House of Commons of the Parliament of the United Kingdom.

1918–1950: The Municipal Borough of Gillingham, part of the Municipal Borough of Rochester, and the Municipal Borough of Chatham ward of St Mary.

The constituency was based around the towns of Gillingham and Rainham, which at that time were in Kent.

Following their review of parliamentary representation in Kent, the Boundary Commission for England abolished Gillingham, replacing it with the renamed constituency of Gillingham and Rainham.

* Cronin was supported by the Lower Deck Parliamentary Committee