How Many People Are Named Colby Williams?
There are approximately 308 people named Colby Williams living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 1,112,839 Americans.
This estimate combines SSA birth records for the first name Colby 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
308
1 in 1,112,839 Americans
Combination Rarity
Uncommon
First Name
View full profileColby
Last Name
View full profileWilliams
Colby: Popularity Over Time
Year-by-year SSA birth registrations for the first name Colby. The peak year was 2001 with 3,979 births. The average person named Colby today is 27 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 "Colby" has an estimated frequency of 0.0163% 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 308 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Colby
Other people with the surname Williams
Colby Williams: Questions and Answers
How many people are named Colby Williams?
We estimate approximately 308 people named Colby Williams are alive in the United States today. The first name Colby is shared by 55,946 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Colby Williams?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 1,112,839 Americans. The first name Colby is uncommon and the surname Williams is very common.
Is Colby a male or female name?
Colby is predominantly male, with 92.8% of bearers being male and 7.2% female. It peaked in popularity in 2001 and the average bearer today is 27 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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