How Many People Are Named Sean Williams?
There are approximately 2,225 people named Sean Williams living in the United States today. That makes this name combination common, occurring at a rate of about 1 in 154,047 Americans.
This estimate combines SSA birth records for the first name Sean with Census Bureau frequency data for the surname Williams. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
2,225
1 in 154,047 Americans
Combination Rarity
Common
First Name
View full profileSean
Last Name
View full profileWilliams
Sean: Popularity Over Time
Year-by-year SSA birth registrations for the first name Sean. The peak year was 1990 with 12,070 births. The average person named Sean today is 39 years old.
Ancestry of the Williams Surname
Self-reported race and ethnicity breakdown for people with the surname Williams, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Sean" has an estimated frequency of 0.118% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Williams" appears at a rate of 550.97 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 2,225 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Sean
Other people with the surname Williams
Sean Williams: Questions and Answers
How many people are named Sean Williams?
We estimate approximately 2,225 people named Sean Williams are alive in the United States today. The first name Sean is shared by 403,789 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Sean Williams?
This name combination is classified as Common, occurring at a rate of about 1 in 154,047 Americans. The first name Sean is common and the surname Williams is very common.
Is Sean a male or female name?
Sean is predominantly male, with 99.3% of bearers being male and 0.7% female. It peaked in popularity in 1990 and the average bearer today is 39 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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