How Many People Are Named Sydney Williams?
There are approximately 969 people named Sydney Williams living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 353,720 Americans.
This estimate combines SSA birth records for the first name Sydney 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
969
1 in 353,720 Americans
Combination Rarity
Uncommon
First Name
View full profileSydney
Last Name
View full profileWilliams
Sydney: Popularity Over Time
Year-by-year SSA birth registrations for the first name Sydney. The peak year was 2000 with 10,369 births. The average person named Sydney today is 24 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 "Sydney" has an estimated frequency of 0.0513% 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 969 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Sydney
Other people with the surname Williams
Sydney Williams: Questions and Answers
How many people are named Sydney Williams?
We estimate approximately 969 people named Sydney Williams are alive in the United States today. The first name Sydney is shared by 175,906 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Sydney Williams?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 353,720 Americans. The first name Sydney is common and the surname Williams is very common.
Is Sydney a male or female name?
Sydney is predominantly female, with 5.0% of bearers being male and 95.0% female. It peaked in popularity in 2000 and the average bearer today is 24 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.
Try another name
How Many of Me