New Hampshire Route 28A

New Hampshire Route 28
Map of southeastern New Hampshire with NH 28 highlighted in red
Route information
Maintained by NHDOT
Length:	85.413 mi (137.459 km)
Major junctions
South end:	Route 28 in Methuen, MA
	NH 28 Bypass in Derry I‑93 in Londonderry I‑293 / NH 101 in Manchester US 3 in Manchester I‑93 in Hooksett US 4 / US 202 / NH 9 in Epsom NH 11 / NH 28A in Alton
North end:	NH 16 in Ossipee
Location
Counties:	Rockingham, Hillsborough, Merrimack, Belknap, Carroll
Highway system
New Hampshire Highway System Interstate U.S. State Turnpikes ← NH 27 NH 31 →

New Hampshire Route 28 is an 85.413-mile-long (137.459 km) north–south state highway in eastern New Hampshire. It connects the town of Ossipee in east-central New Hampshire with Salem on the Massachusetts border, while passing through Manchester, the largest city in the state.

The southern terminus of NH 28 is on the Massachusetts state line in Salem in south central New Hampshire; it keeps the Route 28 designation in the Massachusetts city of Methuen. The northern terminus is at the junction with New Hampshire Route 16, the White Mountain Road, in Ossipee, in northern New Hampshire.

Route 28 parallels Interstate 93 south of Manchester, going slightly northwest, but it goes northeast north of Manchester.

New Hampshire Route 28 Bypass is a 14.124-mile-long (22.730 km) bypass route of New Hampshire Route 28 east of the city of Manchester. The bypass separates from NH 28 in Derry, south of Manchester. While NH 28 runs through central Manchester, NH 28 Bypass runs along the eastern side of Manchester. The two routes rejoin in Hooksett, north of Manchester. The official local name of NH 28 Bypass is Londonderry Turnpike, but local residents generally refer to it simply as "The Bypass." It is the only New Hampshire state highway named and signed as a bypass.