New Hampshire Route 4

New Hampshire Route 4
Map of Strafford County in southeastern New Hampshire with NH 4 highlighted in red
Route information
Maintained by NHDOT
Length	3.78 mi[1] (6.08 km)
Major junctions
West end	NH 9 / NH 108 in Dover
East end	SR 4 in South Berwick, ME
Location
Country	United States
State	New Hampshire
Counties	Strafford
Highway system
New Hampshire Highway System Interstate US State Turnpikes
← US 4 → NH 4A

New Hampshire Route 4 (NH 4) is a 3.78-mile (6.08 km) state highway located in eastern Strafford County, New Hampshire. Its western terminus is at an intersection with New Hampshire Route 9 and New Hampshire Route 108 in Dover. Its northern terminus is at the Maine state border in Rollinsford, where it continues as Maine State Route 4.

For most of its length NH 4 is signed as an east–west highway. Signage in downtown Dover while overlapped with NH 9 and NH 108 is inconsistent as it is sometimes signed north–south. In general, NH 4 follows a southwest-to-northeast alignment.

NH 4 is not related to U.S. Route 4, which also enters the Dover city limits. They are the only non-linked highways to share a number in New Hampshire and remain under NHDOT maintenance. (Maine State Route 113 does cross into New Hampshire near NH 113, but remains completely under MaineDOT maintenance.)