Mirzec [ˈmiʐɛt͡s] is a village in Starachowice County, Świętokrzyskie Voivodeship, in south-central Poland. It is the seat of the gmina (administrative district) called Gmina Mirzec. It lies approximately 10 kilometres (6 mi) north of Starachowice and 42 km (26 mi) north-east of the regional capital Kielce.