New Hampshire Route 1A

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.