How Many People Are Named Wiliam?
An estimated 952 people in the United States have the first name Wiliam. It is almost exclusively a male name. The average bearer is 41 years old, and Wiliam peaked in popularity in 1982 with 28 births that year.
Below you will find a full statistical profile of Wiliam as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Wiliam paired with any surname.
Estimated Living Americans
952
About 1 in 360,036 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
41
years old
Peak Year
1982
28 births
Total Registered
1,243
since 1880
Gender Distribution for Wiliam
Wiliam is almost exclusively a male name. Out of 1,243 total births registered, 100.0% were male.
Wiliam as a male name
Ranked #6,787 in 2024
13 male births in 2024
Peak: 1982 (28 births)
Wiliam: Popularity Over Time
SSA records for Wiliam span from the 1880s to the 2020s, covering 13 decades of naming data. The most popular decade for this name was the 1980s, when 198 babies were registered. Wiliam has declined significantly from its peak in the 1980s. Recent registrations are a fraction of what they were at the name's height.
Wiliam by Decade
How has Wiliam tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Wiliam by State
Birth registrations for Wiliam span all 3 states and territories in the SSA database. The highest counts are in California, New York, Texas. The lowest are in Texas, New York, California. On average, about 7 Wiliams were registered per state.
Wiliam + Last Name Combinations
How many people share a full name with Wiliam as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Wiliam
Other first names starting with W with a similar number of bearers.
Wiliam: Questions and Answers
How many people in the U.S. are named Wiliam?
We estimate approximately 952 people named Wiliam are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 360,036 Americans share this first name.
Is Wiliam a common name?
Wiliam is classified as "Very Rare" and is more popular than 89.8% of all first names in the SSA database. A total of 1,243 births have been registered with this name since 1880.
When was Wiliam most popular?
Wiliam reached peak popularity in 1982, when 28 babies were given this name. The average age of a living person named Wiliam is approximately 41 years old, reflecting when the name was most commonly given.
Is Wiliam a male name?
Wiliam is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Wiliam Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Wiliam Smith, Wiliam Johnson, Wiliam Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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