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 ancestry information.
Expected bearers
2
1 in 171,377,169
Named Kay
53K
Alive today
Named Lenz
13K
Alive today
US population
343M
Denominator
Estimated living: 53K
Rarity: Uncommon
Gender: Female
Peak year: 1942
Average age: 70
Estimated bearers: 13K
Rarity: Uncommon
Census rank: #3,226
Per 100K: 3.79
Top ancestry: White (94.6%)
First name trend
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.
Babies born per year
Ethnicity
Ancestry of the Lenz surname
Self-reported race and ethnicity breakdown for people with the surname Lenz, from the 2010 US Census Bureau. The largest group is White at 94.6%.
- White94.6%
- Hispanic or Latino2.6%
- Two or more races1.3%
- Asian and Pacific Islander0.7%
- Black or African American0.5%
- American Indian and Alaska Native0.3%
Methodology
How we calculated this
The first name Kay has a living-bearer frequency of 0.0153% of the US population, based on 52,598 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Lenz appears at a rate of 3.79 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0038%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 2 people with the full name Kay Lenz. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Kay
Related
Other people with the surname Lenz
FAQ
Kay Lenz: questions and answers
How many people are named Kay Lenz?
We estimate approximately 2 people in the United States share the full name Kay Lenz. That works out to about 1 in 171,377,169 Americans. This is calculated by combining the first-name frequency (0.0153%) with the surname frequency (3.79 per 100K) against the current US population.
How rare is the name Kay Lenz?
We classify Kay Lenz as "Very Rare". About 1 in 171,377,169 Americans share this exact first and last name combination.
Is Kay a male or female name?
Kay is predominantly female. Out of 102,497 total SSA registrations, 3.8% were male and 96.2% were female. See the full Kay profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.