Eastern Hillsborough County, Southern Merrimack County, Western Rockingham County
The Merrimack Valley Region is an area of south-central New Hampshire, approximately 35 miles wide, which runs from Canterbury in the north to the Massachusetts border in the south. It is the most-populated and fastest-growing region of the state, and includes New Hampshire’s largest cities: Manchester, Nashua, Salem and the state capital, Concord.
