Within the UK and Ireland, the surname Harrigan most frequently occurs in Ireland where it is carried by 1 in 9,200 people. The majority of those with the family name of Harrigan are to be found living in/around Ulster (approx. 26% of all UK Harrigan's), Leinster and Munster. The name can also be found in Scotland with 1 in 21,807 people using it, and England with 1 in 64,124.
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