Mirzec is a village located in south-central Poland within the Świętokrzyskie Voivodeship. It serves as the administrative seat of Gmina Mirzec and is situated in Starachowice County.
The village is positioned approximately 10 km (6 mi) north of Starachowice and about 42 km (26 mi) north-east of Kielce, which is the regional capital.