A21 road (Northern Ireland)

The route of the A21 in red from Bangor (Co. Down) to Ballynahinch (Co. Down).

The A21 is a road in County Down in Northern Ireland. The route commences in Bangor, passing through Newtownards, Comber, and Ballygowan, and finishes on the northern outskirts of Ballynahinch.

There are two dual carriageway sections; between Bangor and Newtownards, and between Newtownards and Comber. The second of these passes near the northern shores of Strangford Lough through some of the best agricultural land in Ireland in the vicinity of Comber. This section also passes within 2 miles of Scrabo Tower.

Roads and motorways in Northern Ireland Motorways M1 M2 M3 M5 M12 M22 A8(M) Main 'A' roads A1 A2 A3 A4 A5 A6 A7 A8 A12 A20 A21 A22 A23 A24 A26 A29 A32 A34 A36 A37 A38 A40 A46 A47 A55 A515 A509 Main 'B' roads B1 B52 B53 B136 B193 Others Antrim Road Crumlin Road Donegall Square Donegall Road Falls Road Glenshane Pass Great Victoria Street Lisburn Road Malone Road Ormeau Road Royal Avenue Sandy Row Shaftesbury Square Shankill Road Shore Road Springfield Road Stranmillis Road Westlink

Coordinates: 54°30′20″N 5°47′08″W / 54.50568°N 5.78563°W / 54.50568; -5.78563