Gmina Lubień Kujawski is an urban-rural gmina (administrative district) in Włocławek County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. Its seat is the town of Lubień Kujawski, which lies approximately 29 kilometres (18 mi) south of Włocławek and 79 km (49 mi) south-east of Toruń. The gmina covers an area of 150.21 square kilometres (58.0 sq mi), and as of 2006 its total population is 7,514 (out of which the population of Lubień Kujawski amounts to 1,299, and the population of the rural part of the gmina is 6,215).