How Many People Are Named Kelby?
An estimated 5,369 people in the United States have the first name Kelby. It is used for both genders, with 72.1% male. The average bearer is 30 years old, and Kelby peaked in popularity in 1991 with 277 births that year.
Below you will find a full statistical profile of Kelby 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 Kelby paired with any surname.
Estimated Living Americans
5,369
About 1 in 63,840 people in the U.S.
Rarity
Rare
Predicted Gender
Male
72.1% confidence
Average Age
30
years old
Peak Year
1991
277 births
Total Registered
5,550
since 1880
Gender Distribution for Kelby
Kelby is a genuinely unisex name, used for both males (72.1%) and females (27.9%). Out of 5,550 total births registered, 4,001 were male and 1,549 were female.
Kelby as a male name
Ranked #6,305 in 2024
14 male births in 2024
Peak: 1991 (187 births)
Kelby as a female name
Ranked #6,773 in 2024
17 female births in 2024
Peak: 1991 (90 births)
Kelby: Popularity Over Time
SSA records for Kelby span from the 1940s to the 2020s, covering 9 decades of naming data. The most popular decade for this name was the 1990s, when 1,979 babies were registered. Kelby has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Kelby by Decade
How has Kelby 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.
Kelby by State
Birth registrations for Kelby span all 30 states and territories in the SSA database. The highest counts are in Texas, Oklahoma, Missouri. The lowest are in Wyoming, South Dakota, Oregon. On average, about 53 Kelbys were registered per state.
Kelby + Last Name Combinations
How many people share a full name with Kelby as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kelby
Other first names starting with K with a similar number of bearers.
Kelby: Questions and Answers
How many people in the U.S. are named Kelby?
We estimate approximately 5,369 people named Kelby 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 63,840 Americans share this first name.
Is Kelby a common name?
Kelby is classified as "Rare" and is more popular than 96.7% of all first names in the SSA database. A total of 5,550 births have been registered with this name since 1880.
When was Kelby most popular?
Kelby reached peak popularity in 1991, when 277 babies were given this name. The average age of a living person named Kelby is approximately 30 years old, reflecting when the name was most commonly given.
Is Kelby a male name?
Kelby is predominantly male. 72.1% of people with this name are male. See the gender breakdown above for full details.
How many Kelby Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kelby Smith, Kelby Johnson, Kelby 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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