The Ballycastle Blog: Irish Genealogy and More

Large cities with the highest percentage of Irish ancestry
Boston, Mass 18.87%
Philadelphia, Pennsylvania 14.60%
Buffalo, New York 11.23%
Pittsburgh, Pennsylvania 10.74%
Kansas City, Missouri 9.66%
Cleveland, Ohio 9.43%
Baltimore, Maryland 9.14%
Cincinnati, Ohio 9.05%
St. Louis, Missouri 8.73%
Indianapolis, Indiana 8.61%

Medium-size cities
Augusta, Georgia
Savannah, Georgia
Mobile, Alabama
Charleston, South Carolina
Albany, New York - 18.1%
Omaha, Nebraska
Scranton, Pennsylvania - 30.3%
Syracuse, New York
Saint Paul, Minnesota
Huntsville, Alabama

Source: Wikipedia

See more Irish family history articles and lessons learned in earlier posts below and in the archives.