The Central Statistics Office (CSO) of Ireland 21 September 2017 released migration and diversity data from the last national census. The report shows there were 535,475 non-Irish nationals living in the country in April 2016, a 1.6 percent decrease from 2011.  However, the numbers of people holding dual citizenship (Irish-other country) increased by 87.4 percent to 104,784 persons.

America was among 12 nations with over 10,000 of its citizens living in Ireland, which combined accounted for 73.6 percent of the total non-Irish national population. The 10,519 U.S. citizens living in Ireland last year was slightly fewer than the 11,015 recorded in the 2011 census.

The number of U.S. citizens living in greater Dublin increased to 4,092 in 2016, up from 3,473 in 2011. Over that five years, Cork and Limerick cities also gained Americans; Galway and Waterford cities lost U.S. residents. (My ancestral county of Kerry’s U.S. population declined to 401 from 481.)

Irish-Americans (17,552) comprised the largest group of dual citizenship residents, followed by Irish-U.K. (15,428). Again, Dublin was the stronghold for this demographic, with just over a quarter (26.4 percent) of the statewide total. The Irish-American population also increased in the other Irish cities. (Irish-Americans in Kerry reached 1,000, from 891 in 2011.)

Over 700 U.S. companies have operations in Ireland, employing more than 150,000 people (Irish, Americans, and others), according to the American Chamber of Commerce Ireland. Business sectors include software, pharma, med-tech and finance.