chippenham's population grew rapidly in the 1990s, from 25,376 in 1991 to 28,065 at the 2001 census, an increase of 11%. this reflected the development of large housing estates (indeed, entirely new suburbs) such as cepen park to the west of the town, and the pewsham development to the east (named for the small village of pewsham, further east). by 2007 the figure had reached 34,820.