Kostomłoty Pierwsze [kɔstɔmˈwɔtɨ ˈpjɛrfʂɛ] is a village in the administrative district of Gmina Miedziana Góra, within Kielce County, Świętokrzyskie Voivodeship, in south-central Poland. It lies approximately 3 kilometres (2 mi) south-east of Miedziana Góra and 5 km (3 mi) north-west of the regional capital Kielce.