Radzyń County (Polish: powiat radzyński) 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 Radzyń Podlaski, which lies 60 kilometres (37 mi) north of the regional capital Lublin.

The county covers an area of 965.21 square kilometres (372.7 sq mi).

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