How Many People Are Named Ki?
An estimated 511 people in the United States have the first name Ki. It is used for both genders, with 79.6% male. The average bearer is 29 years old, and Ki peaked in popularity in 2005 with 23 births that year.
Below you will find a full statistical profile of Ki 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 Ki paired with any surname.
Estimated Living Americans
511
About 1 in 670,752 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
79.6% confidence
Average Age
29
years old
Peak Year
2005
23 births
Total Registered
535
since 1880
Gender Distribution for Ki
Ki is a genuinely unisex name, used for both males (79.6%) and females (20.4%). Out of 535 total births registered, 426 were male and 109 were female.
Ki as a male name
Ranked #10,371 in 2022
7 male births in 2022
Peak: 2002 (20 births)
Ki as a female name
Ranked #16,434 in 2023
5 female births in 2023
Peak: 1992 (8 births)
Ki: Popularity Over Time
SSA records for Ki span from the 1940s to the 2020s, covering 9 decades of naming data. The most popular decade for this name was the 2000s, when 152 babies were registered. Ki has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Ki by Decade
How has Ki 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.
Ki by State
Ki + Last Name Combinations
How many people share a full name with Ki as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Ki
Other first names starting with K with a similar number of bearers.
Ki: Questions and Answers
How many people in the U.S. are named Ki?
We estimate approximately 511 people named Ki 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 670,752 Americans share this first name.
Is Ki a common name?
Ki is classified as "Very Rare" and is more popular than 84.8% of all first names in the SSA database. A total of 535 births have been registered with this name since 1880.
When was Ki most popular?
Ki reached peak popularity in 2005, when 23 babies were given this name. The average age of a living person named Ki is approximately 29 years old, reflecting when the name was most commonly given.
Is Ki a male name?
Ki is predominantly male. 79.6% of people with this name are male. See the gender breakdown above for full details.
How many Ki Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Ki Smith, Ki Johnson, Ki 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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