US Population With Last Name Obrien By Race and Ethnicity in the 2010 Census
Updated on December 11, 2025.
Data Source: US Census Bureau.
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In the 2010 Census, there were 118,557 people in the US whose last name was Obrien, and the rate of occurence of the Obrien last name was 40.19 per 100K.
The race of 93.85% of the people with the last name of Obrien was Non Hispanic White Alone (i.e. 111,266 people); 2.32% was Hispanic or Latino (i.e. 2,751 people); and 1.42% was Non Hispanic Two or More Races (i.e. 1,684 people).
The table below below shows by race and ethnicity, the number of people and the percentage of the total people with the Obrien last name.
US Population With Last Name Obrien By Race And Ethniciity in the 2010 Census
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| Last Name | Number of People | Percent of Total (%) |
|---|---|---|
| Non Hispanic White Alone | 111266 | 93.85 |
| Hispanic or Latino | 2751 | 2.32 |
| Non Hispanic Two or More Races | 1684 | 1.42 |
| Non Hispanic Black or African American Alone | 1529 | 1.29 |
| Non Hispanic Asian and Native Hawaiian and Other Pacific Islander Alone | 901 | 0.76 |
| Non Hispanic American Indian and Alaska Native Alone | 439 | 0.37 |