New Hampshire Route 1A
Map of Rockingham County in southeastern New Hampshire with NH 1A highlighted in red
Route information
Maintained by NHDOT
Length	18.405 mi[1] (29.620 km)
Major junctions
South end	Route 1A in Salisbury, MA
Major intersections	NH 101 in Hampton
North end	US 1 in Portsmouth
Location
Country	United States
State	New Hampshire
Counties	Rockingham
Highway system
New Hampshire Highway System Interstate US State Turnpikes
← US 1 → NH 1B

New Hampshire Route 1A is an 18.32-mile (29.48 km) long state highway located in southeast New Hampshire. The route runs along the Atlantic coastline from the Massachusetts border north to Rye, then turns toward downtown Portsmouth. The southern terminus is at the Massachusetts state line in Seabrook where it continues south as Massachusetts Route 1A. The northern terminus is at a junction with U.S. Route 1 in downtown Portsmouth. For the length of the road's run along the shore, its local name is Ocean Boulevard. In the northern part of Rye, it is known as Pioneer Road, and in Portsmouth, it is known as Miller Avenue and Sagamore Avenue.

Route description

NH 1A begins at the state border between Seabrook and Salisbury, Massachusetts. Just 50 yards (46 m) from the state line, NH 1A meets the eastern end of NH 286, an extension of Massachusetts Route 286, a connector to US 1 and Interstate 95 in Salisbury. NH 1A proceeds north, passing east of Hampton Harbor into Hampton Beach. It is on Hampton Beach where NH 101 meets its eastern end at NH 1A as a single-lane alleyway in each direction (Church Street northbound, Highland Avenue southbound). NH 1A continues as a four-lane divided highway running directly next to the coastline beaches. Just north of an intersection with Winnacunnet Road, NH 1A narrows back to a two-lane undivided highway, and then meets the eastern end of NH 27. The road continues another mile or so, crossing into North Hampton, and meets the eastern end of NH 111. NH 1A proceeds north out of North Hampton and along the coastline past Rye Beach, Rye North Beach, Wallis Sands, and Odiorne Point State Park, where it turns west, away from the ocean. The road turns back north at the intersection known as Foyes Corner and enters the Portsmouth city limits, passing the southern end of NH 1B (a connector to New Castle). NH 1A continues towards downtown Portsmouth, where it ends at the intersection of Miller Avenue and Middle Street (US 1).

Major intersections

The entire route is in Rockingham County. ^[1][2]

Location[1][2]	mi[1][2]	km	Destinations	Notes
Seabrook	0.000	0.000	Route 1A south (North End Blvd.) – Salisbury	Continuation into Massachusetts
	0.032	0.051	NH 286 west to US 1 / I-95 – Seabrook, Boston	Eastern terminus of NH 286
Hampton	2.965– 3.164	4.772– 5.092	NH 101 west (Church Street) to US 1 / I-95 – Exeter, Manchester	Eastern terminus of NH 101
	4.152– 4.171	6.682– 6.713	NH 101E west (Winnacunnet Road)	Eastern terminus of NH 101E
	5.210	8.385	NH 27 west (High Street) – Exeter	Eastern terminus of NH 27
North Hampton	6.870	11.056	NH 111 west (Atlantic Avenue) – North Hampton, Exeter	Eastern terminus of NH 111
Portsmouth	16.880	27.166	NH 1B north (Wentworth Road)	Southern terminus of NH 1B
	18.405	29.620	US 1 (Middle Street)	Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Road names along route

NH 1A is known by the following local street names:

Seabrook

• Ocean Boulevard

Hampton

• Ocean Boulevard
• Ashworth Avenue (southbound)

North Hampton

• Ocean Boulevard

Rye

• Ocean Boulevard
• Pioneer Road
• Sagamore Avenue

Portsmouth

• Sagamore Avenue
• Miller Avenue