Tarnawka is a village in the administrative district of Gmina Markowa, within Łańcut County, Subcarpathian Voivodeship, in south-eastern Poland. It lies approximately 8 kilometres (5 mi) south of Markowa, 14 km (9 mi) south of Łańcut, and 22 km (14 mi) south-east of the regional capital Rzeszów.