Gmina Grodzisko Dolne is a rural gmina (administrative district) in Leżajsk County, Subcarpathian Voivodeship, in south-eastern Poland. Its seat is the village of Grodzisko Dolne, which lies approximately 12 kilometres (7 mi) south of Leżajsk and 36 km (22 mi) north-east of the regional capital Rzeszów.

The gmina covers an area of 78.42 square kilometres (30.3 sq mi), and as of 2006 its total population is 8,169 (8,099 in 2011).

Gmina Grodzisko Dolne contains the villages and settlements of Chodaczów, Grodzisko Dolne, Grodzisko Górne, Grodzisko Nowe, Grodzisko-Miasteczko, Laszczyny, Opaleniska, Podlesie, Wólka Grodziska and Zmysłówka.

Gmina Grodzisko Dolne is bordered by the gminas of Białobrzegi, Leżajsk, Tryńcza and Żołynia.

• Polish official population figures 2006