Explore the Family Name O’brian
The meaning of O’brian
Irish: variant of O’Brien. Some characteristic forenames: Irish Liam.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name O’brian in the United States?
Based on the Decennial U.S. Census, the surname O’Brian saw a slight decrease in popularity between 2000 and 2010. In 2000, it ranked as the 9,036th most popular surname in the United States. However, by 2010, its rank had slipped to 10,064, representing an 11.38% drop. The actual count of individuals with the O’Brian surname also fell during this period, from 3,326 to 3,203, marking a 3.7% decrease. Consequently, the proportion of O’Brians per 100,000 people declined from 1.23 to 1.09.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #9,036 | #10,064 | -11.38% |
| Count | 3,326 | 3,203 | -3.7% |
| Proportion per 100k | 1.23 | 1.09 | -11.38% |
Race and Ethnicity of people with the last name O’brian
In terms of ethnicity, the Decennial U.S. Census data reveals some shifts among the O’Brian population between 2000 and 2010. While the majority of O’Brians identified as White (92.99% in 2000 and 91.07% in 2010), other ethnic identities showed notable changes. The Asian/Pacific Islander representation within the O’Brian population increased by 71.43%, while those identifying as two or more races rose by 8.7%. The proportion of O’Brians identifying as Hispanic grew by 18.8%, and those identifying as Black increased by 36.55%. Lastly, the proportion of O’Brians identifying as American Indian and Alaskan Native rose from 0.33% to 0.50%, demonstrating a significant increase of 51.52%.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 92.99% | 91.07% | -2.06% |
| Black | 2.38% | 3.25% | 36.55% |
| Hispanic | 2.5% | 2.97% | 18.8% |
| Two or More Races | 1.38% | 1.5% | 8.7% |
| Asian/Pacific Islander | 0.42% | 0.72% | 71.43% |
| American Indian and Alaskan Native | 0.33% | 0.5% | 51.52% |