Tomaszów Lubelski County is a unit of territorial administration and local government (powiat) in Lublin Voivodeship, eastern Poland, on the border with Ukraine. It was established on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Tomaszów Lubelski, which lies south-east of the regional capital Lublin. The only other towns in the county are Tyszowce, lying north-east of Tomaszów, and Laszczów, lying east of Tomaszów.