How Many People Are Named Koy?
An estimated 944 people in the United States have the first name Koy. It is predominantly male (96.5%). The average bearer is 20 years old, and Koy peaked in popularity in 1997 with 46 births that year.
Below you will find a full statistical profile of Koy as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, state-by-state birth registrations, and, when available, a 2020 Census snapshot showing who had the name at that point in time. You can also check how many people share the full name Koy paired with any surname.
Estimated Living Americans
944
About 1 in 363,087 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
96.5% confidence
Average Age
20
years old
Peak Year
1997
46 births
Total Registered
961
since 1880
Gender Distribution for Koy
Koy is predominantly male (96.5%), though 34 female births have been registered. It functions as a unisex name for a small percentage of bearers.
Koy as a male name
Ranked #3,482 in 2024
33 male births in 2024
Peak: 1997 (46 births)
Koy as a female name
Ranked #12,652 in 1993
6 female births in 1993
Peak: 1982 (7 births)
Koy in the 2020 Census
The 2020 Census recorded 1,118 people with the first name Koy, which placed it at #11,453 in the published first-name tables. This is a snapshot of people who already had the name in 2020. The estimated living count elsewhere on this page is different: it is a current estimate built from SSA birth records and age-based survival rates, so the two figures are not expected to match exactly.
Read this section as a snapshot of people who already had the name in 2020. The SSA charts elsewhere on this page are still the better way to see how the name rose, fell, or shifted across generations.
Gender in the 2020 Census
In the 2020 Census, Koy was recorded as predominantly male. Out of 1,118 people with this name in that snapshot, 74.7% were male and 25.3% were female. That is less heavily male than the long-run SSA birth pattern on this page, which sits at 96.5% male.
Census Count
1,118
people with this name
Census Rank
#11,453
among Census first names
Frequency Rate
0.37
per 100,000 people
Recorded Race and Hispanic Origin in the 2020 Census
In the 2020 Census, the first name Koy was most commonly recorded among people who identified as White (60.11%). The next largest recorded groups were Asian and Pacific Islander (23.26%) and Black (8.50%).
These percentages describe the people who had the first name Koy in the 2020 Census. They do not tell you the deeper meaning or origin of the name itself.
2020 Census demographic breakdown
Each row shows a recorded Census category for people with the first name Koy.
| Group | Share | Count |
|---|---|---|
| White | 60.11% | 672 |
| Asian and Pacific Islander | 23.26% | 260 |
| Black | 8.50% | 95 |
| Hispanic | 3.31% | 37 |
| Two or More Races | 3.22% | 36 |
| American Indian and Alaska Native | 1.61% | 18 |
Koy: Popularity Over Time
SSA records for Koy span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 2000s, when 274 babies were registered. While Koy is less common than at its peak in the 2000s, it remains a well-established name with steady registrations.
Koy by Decade
How has Koy 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.
Koy by State
Birth registrations for Koy span all 7 states and territories in the SSA database. The highest counts are in Texas, Utah, Louisiana. The lowest are in South Dakota, Idaho, Iowa. On average, about 16 Koys were registered per state.
Koy + Last Name Combinations
How many people share a full name with Koy as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Koy
Other first names starting with K with a similar number of bearers.
Koy: Questions and Answers
How many people in the U.S. are named Koy?
We estimate approximately 944 people named Koy 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 363,087 Americans share this first name.
Is Koy a common name?
Koy is classified as "Very Rare" and is more popular than 89.7% of all first names in the SSA database. A total of 961 births have been registered with this name since 1880.
When was Koy most popular?
Koy reached peak popularity in 1997, when 46 babies were given this name. The average age of a living person named Koy is approximately 20 years old, reflecting when the name was most commonly given.
How common was Koy in the 2020 Census?
The 2020 Census recorded 1,118 people with the first name Koy. That placed it at #11,453 in the published Census first-name tables, or 0.37 people per 100,000.
Why is the Census count different from the living estimate?
Because they measure different things. The Census number is a count of people with the name in 2020. The living estimate is a current model based on SSA birth records and survival rates, so it aims to estimate how many people with the name are alive now.
What does the SSA popularity chart show?
The popularity chart tracks birth registrations, not people currently alive. It shows how often Koy was given to babies from 1880 through 2024, which is why it is the best tool on the page for seeing long-run naming trends.
What does the Census say about the gender split for Koy?
In the 2020 Census snapshot, Koy was recorded as predominantly male. The published split was 74.7% male and 25.3% female.
What does the Census say about the background of people named Koy?
In the 2020 Census, the first name Koy was most commonly recorded among people who identified as White (60.11%). The next largest recorded groups were Asian and Pacific Islander (23.26%) and Black (8.50%). These percentages describe the people who had the name in the 2020 Census, not the deeper meaning or origin of the name itself.
Why can the Census sex total and race total differ slightly?
The Census published separate first-name tables for sex and for race and Hispanic origin. Those totals can differ slightly for the same name, so the page uses them as two related snapshots rather than treating them as perfectly interchangeable counts.
Does every first name have Census demographic data?
No. The public Census first-name tables only include names that met the Bureau's publication rules. That means some names on this site will have SSA history but no published Census demographic snapshot.
Is Koy a male name?
Koy is predominantly male. 96.5% of people with this name are male. See the gender breakdown above for full details.
Why can Koy have a lot of living bearers even if it is not trendy now?
Because a name can build up a large population over many decades. Koy peaked in 1997, and the average living bearer is about 20 years old, so a name can still have millions of living bearers even after it stops feeling current for newborns.
How many Koy Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Koy Smith, Koy Johnson, Koy 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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