The name A37 is used to refer to two roads in Northern Ireland.

In the north, there is a road from Coleraine to Limavady, part of the Coleraine to Derry route.

In the south, there is a short road in County Armagh. It connects two sections of the N53, a route in the Republic, which connects the towns of Castleblaney and Dundalk. The road is about 3.4 miles long, and goes through the village of Cullaville.