Łęczna County (Polish: powiat łęczyński) 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.

Its administrative seat and only town is Łęczna, which lies 23 kilometres (14 mi) east of the regional capital Lublin.

The county covers an area of 633.75 square kilometres (244.7 sq mi).

The county is a featured locale in the Codemasters racing game DiRT Rally 2.0.