Gmina Trzemeszno is an urban-rural gmina in Gniezno County, Greater Poland Voivodeship, in west-central Poland. Its seat is the town of Trzemeszno, which lies approximately 16 kilometres east of Gniezno and 64 km east of the regional capital Poznań. The gmina covers an area of 174.81 square kilometres, and as of 2006 its total population is 14,019.