A509 road (Northern Ireland)

{{Short description|Road in Northern Ireland}}

{{Use dmy dates|date=April 2025}}

{{Use Hiberno-English|date=February 2018}}

{{one source|date=October 2008}}

{{Infobox road

|country=NIR

|type=A

|route=509

|direction_a= North

|terminus_a = Enniskillen

|direction_b= Finish

|terminus_b = Belturbet

|junction = 50px A4 in Enniskillen
50px A32 in Enniskillen
50px A46 in Enniskillen
50px N3 in Belturbet

|destinations= Enniskillen
Derrylin
Belturbet
Cavan

}}

File:A46 road (Ireland) & N3 road (north) (Ireland) & A509 road (Ireland).jpg (Co. Fermanagh) to near Belturbet (Co. Cavan). The continuations of this longer Dublin-Ballyshannon (Co. Donegal) route are also shown; the N3 from Dublin to Belturbet in green, the A46 from Enniskillen to Belleek (Co. Fermanagh) in red, and the N3 from Belleek to Ballyshannon in orange.]]

The A509 is a road in Northern Ireland. It travels through County Fermanagh and continues to Cavan and Dublin in the Republic of Ireland as the N3.

The road is a single-carriageway primary route, and forms part of a road corridor from Dublin to Ballyshannon via the N3 route in the Republic of Ireland and the A4 and A46 routes in Northern Ireland.