County Mayo and its neighbours, with every town above a
thousand people. Boundaries and water from Tailte Éireann and OSNI.
Populations from the most recent census, 2022 in the south and 2021 in the north.
IrishMaigh Eo
ProvinceConnacht
County townCastlebar
Area5,588 km², third largest county
Population137,970 (2022)
Coastline1,168 km, roughly a fifth of the State's coastline
No history for County Mayo yet.
No places for County Mayo yet.
No people for County Mayo yet.
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Mayo lost people at every census between 1841 and 1971, and by 1906 not one labourers cottage had been built in the county.