Loudon Town Hall is a historic New England meetinghouse at 433 Clough Hill Road in Loudon, New Hampshire. Built in 1779 and extensively restyled in 1847, this Greek Revival structure was used for many years for both religious and civic purposes; it now serves principally as a church, housing a Free Will Baptist congregation. The building was listed on the National Register of Historic Places in 1990; it is one of the oldest civic buildings in Merrimack County.