New Hampshire Route 109 (abbreviated NH 109) is a 41.029-mile-long (66.030 km) north–south highway in Carroll County, New Hampshire. It runs southeast from Sandwich to the Maine border.
NH 109 between Wolfeboro and Moultonborough is locally known as the Governor Wentworth Highway, with signage reading "The Governor John Wentworth Highway", in reference to Sir John Wentworth, 1st Baronet (1737–1820), who served as provincial governor from 1767 to 1775.
New Hampshire Route 109A (abbreviated NH 109A) is an 8.743-mile-long (14.070 km) north–south highway in Carroll County, New Hampshire. The road splits off from New Hampshire Route 109, runs southeast roughly parallel to NH 109, and rejoins NH 109 again. The northern section of NH 109A is locally named Middle Road. The southern section is locally named Pine Hill Road.