Kari Lehtonen
There are approximately 1 people named Kari Lehtonen living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 342,754,338 Americans.
This estimate combines SSA birth records for the first name Kari with Census Bureau frequency data for the surname Lehtonen. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
1
1 in 342,754,338
Named Kari
55K
Alive today
Named Lehtonen
446
Alive today
US population
343M
Denominator
Estimated living: 55K
Rarity: Uncommon
Gender: Female
Peak year: 1975
Average age: 46
Estimated bearers: 446
Rarity: Very Rare
Census rank: #53,204
Per 100K: 0.13
Top ancestry: White (94.1%)
First name trend
Kari: popularity over time
Year-by-year SSA birth registrations for the first name Kari. The peak year was 1975 with 2,243 births. The average person named Kari today is 46 years old.
Babies born per year
Ethnicity
Ancestry of the Lehtonen surname
Self-reported race and ethnicity breakdown for people with the surname Lehtonen, from the 2010 US Census Bureau. The largest group is White at 94.1%.
- White94.1%
- Hispanic or Latino3.1%
- Two or more races2.1%
Methodology
How we calculated this
The first name Kari has a living-bearer frequency of 0.0160% of the US population, based on 54,789 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Lehtonen appears at a rate of 0.13 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0001%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 1 people with the full name Kari Lehtonen. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
FAQ
Kari Lehtonen: questions and answers
How many people are named Kari Lehtonen?
We estimate approximately 1 people in the United States share the full name Kari Lehtonen. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0160%) with the surname frequency (0.13 per 100K) against the current US population.
How rare is the name Kari Lehtonen?
We classify Kari Lehtonen as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Kari a male or female name?
Kari is predominantly female. Out of 60,515 total SSA registrations, 1.5% were male and 98.5% were female. See the full Kari 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.