Historically , large Irish American communities have been found in Philadelphia ; Chicago ; Boston ; New York City ; New York ; Detroit ; New England ; Baltimore ; Pittsburgh ; St. Paul , Minnesota ; Buffalo ; Broome County ; Butte ; Dubuque ; Quincy ; Dublin ; Hartford ; New Haven ; Waterbury ; Providence ; Kansas City ; New Orleans ; Braintree ; Weymouth ; Nashville ; Scranton ; Wilkes-Barre ; O'Fallon ; Tampa ; Hazleton ; Worcester ; Lowell ; Los Angeles ; and the San Francisco Bay Area .
Large Irish American communities have been found in less than fifteen US areas .