Explore the Family Name O’callahan
The meaning of O’callahan
Irish: Anglicized form of Ó Ceallacháin (see Callahan).
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name O’callahan in the United States?
Based on the Decennial U.S. Census data, the popularity of the O’Callahan surname witnessed a slight decline between 2000 and 2010. The rank of this surname fell from 55,481 in 2000 to 56,310 in 2010, which is a change of -1.49%. However, interestingly, the count of people with this surname increased by 4.91%, rising from 346 in 2000 to 363 in 2010. Despite the growth in count, the proportion per 100k decreased by 7.69%, shifting from 0.13 in 2000 to 0.12 in 2010.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #55,481 | #56,310 | -1.49% |
| Count | 346 | 363 | 4.91% |
| Proportion per 100k | 0.13 | 0.12 | -7.69% |
Race and Ethnicity of people with the last name O’callahan
In terms of ethnic identity, the Decennial U.S. Census data reveals that the majority of individuals with the O’Callahan surname are of White ethnicity. This group accounted for 96.24% in 2000, and although it saw a minimal decrease of 0.38%, it still made up 95.87% in 2010. Meanwhile, the Hispanic identity within the O’Callahan surname holders saw a significant increase of 75.14%, moving from 1.73% in 2000 to 3.03% in 2010. There was negligible or no representation from Asian/Pacific Islander, Two or more races, Black, or American Indian and Alaskan Native identities during both these years.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 96.24% | 95.87% | -0.38% |
| Hispanic | 1.73% | 3.03% | 75.14% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Two or More Races | 0% | 0% | 0% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |