How Many People Are Named Isaac Williams?
There are approximately 1,634 people named Isaac Williams living in the United States today. That makes this name combination common, occurring at a rate of about 1 in 209,764 Americans.
This estimate combines SSA birth records for the first name Isaac 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
1,634
1 in 209,764 Americans
Combination Rarity
Common
First Name
View full profileIsaac
Last Name
View full profileWilliams
Isaac: Popularity Over Time
Year-by-year SSA birth registrations for the first name Isaac. The peak year was 2007 with 10,287 births. The average person named Isaac today is 22 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 "Isaac" has an estimated frequency of 0.0865% 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 1,634 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Isaac
Other people with the surname Williams
Isaac Williams: Questions and Answers
How many people are named Isaac Williams?
We estimate approximately 1,634 people named Isaac Williams are alive in the United States today. The first name Isaac is shared by 296,602 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Isaac Williams?
This name combination is classified as Common, occurring at a rate of about 1 in 209,764 Americans. The first name Isaac is common and the surname Williams is very common.
Is Isaac a male or female name?
Isaac is predominantly male, with 99.8% of bearers being male and 0.2% female. It peaked in popularity in 2007 and the average bearer today is 22 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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