How Many People Are Named Kirby Smith?
There are approximately 113 people named Kirby Smith living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 3,033,224 Americans.
This estimate combines SSA birth records for the first name Kirby with Census Bureau frequency data for the surname Smith. Below you will find a breakdown of both names, including popularity trends, gender data, and Census background data where it is available.
Estimated People with This Name
113
1 in 3,033,224 Americans
Combination Rarity
Uncommon
First Name
View full profileKirby
Last Name
View full profileSmith
Kirby: Popularity Over Time
Year-by-year SSA birth registrations for the first name Kirby. The peak year was 1984 with 509 births. The average person named Kirby today is 48 years old.
Ancestry of the First Name Kirby
In the 2020 Census, the first name Kirby was most commonly recorded among people who identified as White (77.32%). The next largest recorded groups were Black (12.40%) and Two or More Races (3.18%).
These percentages describe the people who had the first name Kirby in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.
Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Kirby rose or fell over time.
Ancestry of the Smith Surname
The surname Smith was most commonly recorded among people who identified as White in the 2020 Census.
This is a self-reported race and ethnicity breakdown for people who had the surname Smith in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.
How we calculated this
The first name "Kirby" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Smith" appears at a rate of 792.79 per 100,000 people in the 2020 U.S. Census.
We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Kirby are likely to be alive now.
Multiplying these frequencies against the U.S. population of ~343 million gives 113 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Kirby
Other people with the surname Smith
Kirby Smith: Questions and Answers
How many people are named Kirby Smith?
We estimate approximately 113 people named Kirby Smith are alive in the United States today. The first name Kirby is shared by 14,306 Americans, and the surname Smith is shared by 2,717,332.
How rare is the name Kirby Smith?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 3,033,224 Americans. The first name Kirby is uncommon and the surname Smith is very common.
Is Kirby a male or female name?
Kirby is predominantly male, with 78.8% of bearers being male and 21.2% female. It peaked in popularity in 1984 and the average bearer today is 48 years old.
What does the Census say about the first name Kirby?
In the 2020 Census, the first name Kirby was most commonly recorded among people who identified as White (77.32%). The next largest recorded groups were Black (12.40%) and Two or More Races (3.18%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.
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. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.
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