How Many People Are Named Caitlin Williams?
There are approximately 597 people named Caitlin Williams living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 574,128 Americans.
This estimate combines SSA birth records for the first name Caitlin 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
597
1 in 574,128 Americans
Combination Rarity
Uncommon
First Name
View full profileCaitlin
Last Name
View full profileWilliams
Caitlin: Popularity Over Time
Year-by-year SSA birth registrations for the first name Caitlin. The peak year was 1988 with 7,274 births. The average person named Caitlin today is 32 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 "Caitlin" has an estimated frequency of 0.0316% 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 597 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Caitlin
Other people with the surname Williams
Caitlin Williams: Questions and Answers
How many people are named Caitlin Williams?
We estimate approximately 597 people named Caitlin Williams are alive in the United States today. The first name Caitlin is shared by 108,321 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Caitlin Williams?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 574,128 Americans. The first name Caitlin is common and the surname Williams is very common.
Is Caitlin a male or female name?
Caitlin is predominantly female, with 0.3% of bearers being male and 99.7% female. It peaked in popularity in 1988 and the average bearer today is 32 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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