Tumlin-Osowa [ˈtumlin ɔˈsɔva] is a village in the administrative district of Gmina Zagnańsk, within Kielce County, Świętokrzyskie Voivodeship, in south-central Poland. It lies approximately 5 km (3 mi) west of Zagnańsk and 11 km (7 mi) north of the regional capital Kielce.