Siemierz [ˈɕɛmjɛʂ] is a village in the administrative district of Gmina Rachanie, within Tomaszów Lubelski County, Lublin Voivodeship, in eastern Poland. It lies approximately 7 kilometres (4 mi) north-west of Rachanie, 17 km (11 mi) north-east of Tomaszów Lubelski, and 100 km (62 mi) south-east of the regional capital Lublin.