How Many People Are Named Erin Williams?
There are approximately 1,677 people named Erin Williams living in the United States today. That makes this name combination common, occurring at a rate of about 1 in 204,385 Americans.
This estimate combines SSA birth records for the first name Erin 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
1,677
1 in 204,385 Americans
Combination Rarity
Common
First Name
View full profileErin
Last Name
View full profileWilliams
Erin: Popularity Over Time
Year-by-year SSA birth registrations for the first name Erin. The peak year was 1983 with 15,051 births. The average person named Erin 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 "Erin" has an estimated frequency of 0.0888% 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 1,677 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Erin
Other people with the surname Williams
Erin Williams: Questions and Answers
How many people are named Erin Williams?
We estimate approximately 1,677 people named Erin Williams are alive in the United States today. The first name Erin is shared by 304,342 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Erin Williams?
This name combination is classified as Common, occurring at a rate of about 1 in 204,385 Americans. The first name Erin is common and the surname Williams is very common.
Is Erin a male or female name?
Erin is predominantly female, with 2.9% of bearers being male and 97.1% female. It peaked in popularity in 1983 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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