Zamość County (Polish: powiat zamojski) is a unit of territorial administration and local government (powiat) in Lublin Voivodeship, eastern Poland.

It was established on January 1, 1999, as a result of the Polish local government reforms passed in 1998.

The county contains three towns: Szczebrzeszyn, which lies 21 km (13 mi) west of Zamość, Zwierzyniec, which lies 24 km (15 mi) south-west of Zamość, and Krasnobród, 22 km (14 mi) south of Zamość.

The county covers an area of 1,872.27 square kilometres (722.9 sq mi).

These are listed in the following table, in descending order of population.