 As of 2006 its total population is 40,880, out of which the population of Sępólno Krajeńskie is 9,258, that of Więcbork is 5,788, that of Kamień Krajeński is 2,251, and the rural population is 23,583.Sępólno County is bordered by Człuchów County and Chojnice County to the north, Tuchola County to the north-east, Bydgoszcz County to the south-east, Nakło County to the south, and Piła County and Złotów County to the west.The county is subdivided into four gminas (three urban-rural and one rural).