How Many People Are Named Pat Obrien?
There are approximately 12 people named Pat Obrien living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 28,562,862 Americans.
This estimate combines SSA birth records for the first name Pat with Census Bureau frequency data for the surname Obrien. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
12
1 in 28,562,862 Americans
Combination Rarity
Rare
First Name
View full profilePat
Last Name
View full profileObrien
Pat: Popularity Over Time
Year-by-year SSA birth registrations for the first name Pat. The peak year was 1947 with 2,543 births. The average person named Pat today is 73 years old.
Ancestry of the Obrien Surname
Self-reported race and ethnicity breakdown for people with the surname Obrien, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Pat" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Obrien" appears at a rate of 40.19 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 12 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Pat
Other people with the surname Obrien
Pat Obrien: Questions and Answers
How many people are named Pat Obrien?
We estimate approximately 12 people named Pat Obrien are alive in the United States today. The first name Pat is shared by 29,680 Americans, and the surname Obrien is shared by 134,995.
How rare is the name Pat Obrien?
This name combination is classified as Rare, occurring at a rate of about 1 in 28,562,862 Americans. The first name Pat is uncommon and the surname Obrien is common.
Is Pat a male or female name?
Pat is predominantly female, with 40.0% of bearers being male and 60.0% female. It peaked in popularity in 1947 and the average bearer today is 73 years old.
Where does this data come from?
First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. Surname data comes from the 2010 U.S. Census Bureau. Full methodology.
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