How Many People Are Named Kay Lenz?
There are approximately 2 people named Kay Lenz living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 171,377,169 Americans.
This estimate combines SSA birth records for the first name Kay with Census Bureau frequency data for the surname Lenz. 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
2
1 in 171,377,169 Americans
Combination Rarity
Very Rare
First Name
View full profileKay
Last Name
View full profileLenz
Kay: Popularity Over Time
Year-by-year SSA birth registrations for the first name Kay. The peak year was 1942 with 3,719 births. The average person named Kay today is 70 years old.
Ancestry of the First Name Kay
In the 2020 Census, the first name Kay was most commonly recorded among people who identified as White (84.76%). The next largest recorded groups were Black (6.19%) and Asian and Pacific Islander (4.97%).
These percentages describe the people who had the first name Kay 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 Kay rose or fell over time.
Ancestry of the Lenz Surname
The surname Lenz 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 Lenz 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 "Kay" has an estimated frequency of 0.0153% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Lenz" appears at a rate of 3.58 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 Kay are likely to be alive now.
Multiplying these frequencies against the U.S. population of ~343 million gives 2 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Kay
Other people with the surname Lenz
Kay Lenz: Questions and Answers
How many people are named Kay Lenz?
We estimate approximately 2 people named Kay Lenz are alive in the United States today. The first name Kay is shared by 52,598 Americans, and the surname Lenz is shared by 12,262.
How rare is the name Kay Lenz?
This name combination is classified as Very Rare, occurring at a rate of about 1 in 171,377,169 Americans. The first name Kay is uncommon and the surname Lenz is uncommon.
Is Kay a male or female name?
Kay is predominantly female, with 3.8% of bearers being male and 96.2% female. It peaked in popularity in 1942 and the average bearer today is 70 years old.
What does the Census say about the first name Kay?
In the 2020 Census, the first name Kay was most commonly recorded among people who identified as White (84.76%). The next largest recorded groups were Black (6.19%) and Asian and Pacific Islander (4.97%). 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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