 The gmina covers an area of , and as of 2006 its total population is 6,542.Gmina Sanniki contains the villages and settlements of Aleksandrów, Brzezia, Brzeziny, Czyżew, Działy, Krubin, Lasek, Lubików, Lwówek, Mocarzewo, Nowy Barcik, Osmolin, Osmólsk Górny, Sanniki, Sielce, Staropol, Stary Barcik, Szkarada, Wólka Niska and Wólka Wysoka.Gmina Sanniki is bordered by the gminas of Gąbin, Iłów, Kiernozia, Pacyna and Słubice.