Mieleszyn is a village located in central Poland. It is situated within the administrative district of Gmina Bolesławiec, which is part of Wieruszów County in the Łódź Voivodeship.
The village is positioned approximately 5 km north of Bolesławiec and 8 km southeast of Wieruszów. It lies about 107 km southwest of the regional capital, Łódź.