Gmina Kruszwica is an urban-rural gmina in Inowrocław County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. Its seat is the town of Kruszwica, which lies approximately 14 kilometres south of Inowrocław and 44 km south-west of Toruń. The gmina covers an area of 262.19 square kilometres, and as of 2006 its total population is 19,971.