Cahul County was a county (Romanian: județ) in Moldova from 1998 to 2003, with the seat at Cahul.

The county bordered Romania (west) and Ukraine (southeast), with the Moldovan counties of Lăpuşna and Taraclia County (in the Autonomous Territorial Unit of Gagauzia).

Cahul County was formed in 1998 on the territory of the former Moldovan districts of Cahul, Cantemir and Vulcănești.

Geographically, the county was located in Prutul de Jos Plain, the Western Black Sea Plain, and Tigheci Plateau.

This Moldova location article is a stub.