How Common Is the Surname Brennan?
The surname Brennan is the #701 most common last name in the United States, with an estimated 56,061 bearers. That's about 1 in 5,992 Americans. This data comes from the 2010 U.S. Census Bureau surname frequency tables.
This page covers the Brennan surname's frequency in the U.S. population, its rank among all American surnames, and a breakdown of ancestry and ethnicity data from the Census. You can also check how many people share any first + last name combination involving Brennan.
Estimated Americans with this Surname
56,061
About 1 in 5,992 people in the U.S.
Census Rank
#701
Frequency Rate
16.69
per 100,000 people
Census Count
49,238
2010 Census
Data Source
2010
U.S. Census Bureau
Ancestry and Ethnicity for Brennan
The Brennan surname is most commonly associated with people who identify as White (94.56%). The next largest groups are Hispanic (2.32%) and Two or More Races (1.26%).
Self-reported race and ethnicity from the 2010 U.S. Census Bureau surname tables. Some categories may be suppressed for privacy when sample sizes are small.
How Many People Are Named ... Brennan?
Pair the Brennan surname with a first name to estimate how many people share that full name in the United States.
Brennan Surname: Questions and Answers
How common is the last name Brennan?
Brennan is the #701 most common surname in the United States, with an estimated 56,061 people sharing this last name. It appears at a rate of 16.69 per 100,000 Americans.
What ethnicity is the surname Brennan?
The Brennan surname is most commonly associated with people who identify as White (94.56%). The next largest groups are Hispanic (2.32%) and Two or More Races (1.26%). This data comes from the 2010 U.S. Census Bureau surname tables, which include self-reported race and ethnicity breakdowns.
How many people named [First Name] Brennan are there?
We can estimate any first + last name combination. Popular examples: Michael Brennan, James Brennan, John Brennan. Search any combination on our homepage.
Where does this surname data come from?
Surname frequency data comes from the 2010 U.S. Census Bureau decennial surname tables. These list every surname appearing in the Census along with frequency rates and demographic breakdowns. Full methodology.
Search for a full name combination
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