Liberia is divided into fifteen counties, which, in turn, are subdivided into a total of 90 districts and further subdivided into ''clans''. The oldest counties are Grand Bassa and Montserrado, both founded in 1839 prior to Liberian independence. Gbarpolu is the newest county, created in 2001. Nimba is the largest of the counties in size at , while Montserrado is the smallest at . Montserrado is also the most populous county with 1,144,806 residents as of the 2008 census.