How Many People Are Named Knox?
An estimated 21,882 people in the United States have the first name Knox. It is predominantly male (99.0%). The average bearer is 9 years old, and Knox peaked in popularity in 2022 with 1,929 births that year.
Below you will find a full statistical profile of Knox 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 Knox paired with any surname.
Key Insights
- While Knox is overwhelmingly male, 227 female births have been registered with this name since 1880.
- Knox is a modern name. With an average bearer age of just 9, it has gained most of its popularity in recent years.
Estimated Living Americans
21,882
About 1 in 15,664 people in the U.S.
Rarity
Uncommon
Predicted Gender
Male
99.0% confidence
Average Age
9
years old
Peak Year
2022
1,929 births
Total Registered
22,521
since 1880
Gender Distribution for Knox
Knox is predominantly male (99.0%), though 227 female births have been registered. It functions as a unisex name for a small percentage of bearers.
Knox as a male name
Ranked #209 in 2024
1,701 male births in 2024
Peak: 2022 (1,900 births)
Knox as a female name
Ranked #6,036 in 2024
20 female births in 2024
Peak: 2022 (29 births)
Knox: Popularity Over Time
SSA records for Knox span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 2010s, when 12,168 babies were registered. While Knox is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Knox by Decade
How has Knox 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.
Knox by State
Birth registrations for Knox span all 50 states and territories in the SSA database. The highest counts are in Texas, Tennessee, California. The lowest are in Rhode Island, District of Columbia, New Hampshire. On average, about 418 Knoxs were registered per state.
Knox + Last Name Combinations
How many people share a full name with Knox as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Knox
Other first names starting with K with a similar number of bearers.
Knox: Questions and Answers
How many people in the U.S. are named Knox?
We estimate approximately 21,882 people named Knox 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 15,664 Americans share this first name.
Is Knox a common name?
Knox is classified as "Uncommon" and is more popular than 98.6% of all first names in the SSA database. A total of 22,521 births have been registered with this name since 1880.
When was Knox most popular?
Knox reached peak popularity in 2022, when 1,929 babies were given this name. The average age of a living person named Knox is approximately 9 years old, reflecting when the name was most commonly given.
Is Knox a male name?
Knox is predominantly male. 99.0% of people with this name are male. See the gender breakdown above for full details.
How many Knox Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Knox Smith, Knox Johnson, Knox 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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