Mierzęcin [mjɛˈʐɛnt͡ɕin] is a village in the administrative district of Gmina Polska Cerekiew, within Kędzierzyn-Koźle County, Opole Voivodeship, in south-western Poland. It lies approximately 13 kilometres (8 mi) north-west of Polska Cerekiew, 19 km (12 mi) south-west of Kędzierzyn-Koźle, and 43 km (27 mi) south of the regional capital Opole.