Here are some details about Co. Donegal based on data in OpenStreetMap. (Debug overlaps and coverage)

Donegal is on Logainm.ie: Donegal.

Area

Donegal has an area of 4,857.3 km² / 1,200,271.4 acres / 1,875.4 square miles.

Donegal has a total water area of 80,148,955.3 m², which is 1.7% of the total area

Baronies

There are 8 baronies in Co. Donegal that we know about. You may wish to compare this list (below) with Wikipedia's list of baronies in Donegal.

Civil Parishes

There are 53 civil parishes in Co. Donegal that we know about. You may wish to compare this list (below) with Wikipedia's list of civil parishes in Donegal.

Electoral Divisions

There are 143 electoral divisions in Co. Donegal that we know about.

Townlands

There are 2709 townlands that we know about in Co. Donegal. This represents 100% of all the area in Co. Donegal. You may wish to compare this list (below) with Wikipedia's list of townlands in Donegal.

Subtownlands

There are 1736 subtownlands that we know about in Co. Donegal.