How Many People Are Named Katja?
An estimated 908 people in the United States have the first name Katja. It is almost exclusively a female name. The average bearer is 28 years old, and Katja peaked in popularity in 1998 with 48 births that year.
Below you will find a full statistical profile of Katja as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Katja paired with any surname.
Estimated Living Americans
908
About 1 in 377,483 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
28
years old
Peak Year
1998
48 births
Total Registered
944
since 1880
Gender Distribution for Katja
Katja is almost exclusively a female name. Out of 944 total births registered, 100.0% were female.
Katja as a female name
Ranked #10,641 in 2024
9 female births in 2024
Peak: 1998 (48 births)
Katja: Popularity Over Time
SSA records for Katja span from the 1960s to the 2020s, covering 7 decades of naming data. The most popular decade for this name was the 1990s, when 253 babies were registered. Katja has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Katja by Decade
How has Katja 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.
Katja by State
Birth registrations for Katja span all 3 states and territories in the SSA database. The highest counts are in California, New York, Texas. The lowest are in Texas, New York, California. On average, about 20 Katjas were registered per state.
Katja + Last Name Combinations
How many people share a full name with Katja as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Katja
Other first names starting with K with a similar number of bearers.
Katja: Questions and Answers
How many people in the U.S. are named Katja?
We estimate approximately 908 people named Katja 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 377,483 Americans share this first name.
Is Katja a common name?
Katja is classified as "Very Rare" and is more popular than 89.5% of all first names in the SSA database. A total of 944 births have been registered with this name since 1880.
When was Katja most popular?
Katja reached peak popularity in 1998, when 48 babies were given this name. The average age of a living person named Katja is approximately 28 years old, reflecting when the name was most commonly given.
Is Katja a female name?
Katja is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Katja Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Katja Smith, Katja Johnson, Katja 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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