How Many People Are Named Kolby Johnson?
There are approximately 82 people named Kolby Johnson living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 4,179,931 Americans.
This estimate combines SSA birth records for the first name Kolby with Census Bureau frequency data for the surname Johnson. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
82
1 in 4,179,931 Americans
Combination Rarity
Rare
First Name
View full profileKolby
Last Name
View full profileJohnson
Kolby: Popularity Over Time
Year-by-year SSA birth registrations for the first name Kolby. The peak year was 2001 with 781 births. The average person named Kolby today is 22 years old.
Ancestry of the Johnson Surname
Self-reported race and ethnicity breakdown for people with the surname Johnson, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Kolby" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Johnson" appears at a rate of 655.24 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 82 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Kolby
Other people with the surname Johnson
Kolby Johnson: Questions and Answers
How many people are named Kolby Johnson?
We estimate approximately 82 people named Kolby Johnson are alive in the United States today. The first name Kolby is shared by 12,578 Americans, and the surname Johnson is shared by 2,200,907.
How rare is the name Kolby Johnson?
This name combination is classified as Rare, occurring at a rate of about 1 in 4,179,931 Americans. The first name Kolby is uncommon and the surname Johnson is very common.
Is Kolby a male or female name?
Kolby is predominantly male, with 89.8% of bearers being male and 10.2% female. It peaked in popularity in 2001 and the average bearer today is 22 years old.
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. Surname data comes from the 2010 U.S. Census Bureau. Full methodology.
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