Chengalpattu is a defunct Lok Sabha constituency in Tamil Nadu.

It was earlier known as Chingleput.

This constituency no longer exists, since it was defunct after 2009, due to delimitation.

The region covered by this constituency are now a part of the Kancheepuram (Lok Sabha constituency).

Chengalpattu Lok Sabha constituency was composed of the following assembly segments:[1] Defunct after 2009 changed to Kanchipuram loksabha constituency.