2,253 people named O'Callaghan work outside their country of origin. Most are in United Kingdom, United States, Australia.
| Country | People |
|---|---|
| United Kingdom | 660 |
| United States | 604 |
| Australia | 196 |
| Ireland | 107 |
| Canada | 96 |
| Germany | 79 |
| Switzerland | 61 |
| France | 52 |
| Spain | 51 |
| Netherlands | 42 |
| Sweden | 35 |
| New Zealand | 26 |
| India | 19 |
| Belgium | 19 |
| South Africa | 16 |
| Italy | 15 |
| Denmark | 14 |
| Japan | 13 |
| Luxembourg | 11 |
| Austria | 9 |
| Hong Kong | 9 |
| Finland | 8 |
| China | 8 |
| Brazil | 8 |
| Norway | 7 |
| United Arab Emirates | 6 |
| Hungary | 6 |
| Singapore | 6 |
| Egypt | 5 |
| Philippines | 5 |
| Other | 60 |
| Country of origin | People |
|---|---|
| Ireland | 1,110 |
| United Kingdom | 478 |
| United States | 247 |
| Australia | 161 |
| India | 62 |
| Canada | 49 |
| New Zealand | 37 |
| South Africa | 16 |
| Spain | 13 |
| Venezuela | 11 |
| Netherlands | 10 |
| Germany | 8 |
| Sri Lanka | 7 |
| Other | 44 |
| Industry | People |
|---|---|
| Other / unknown | 2,085 |
| Construction | 25 |
| Real estate | 20 |
| Professional and scientific | 20 |
| Information and communication | 17 |
| Administrative and support | 14 |
| Health and social work | 10 |
| Finance and insurance | 10 |
| Wholesale and retail trade | 9 |
| Education | 8 |
| Manufacturing | 6 |
| Households | 5 |
| Accommodation and food | 5 |
| Arts and recreation | 5 |
| Other | 14 |
Counts of people with this surname recorded in a country other than their country of origin, from company registers, ORCID, VIAF, Wikidata and career records; origin may be recorded or estimated from the name. Groups under 5 people are folded into "Other". Nobody is named on this page.
Aggregate statistics from official company registers, ORCID, VIAF and Wikidata, compiled by compatriots.net · data build v3_20261030. No individual is named on this page. See methodology & privacy.