How Many People Are Named Ja?
An estimated 417 people in the United States have the first name Ja. It is used for both genders, with 68.7% male. The average bearer is 32 years old, and Ja peaked in popularity in 2000 with 29 births that year.
Below you will find a full statistical profile of Ja 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 Ja paired with any surname.
Estimated Living Americans
417
About 1 in 821,953 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
68.7% confidence
Average Age
32
years old
Peak Year
2000
29 births
Total Registered
435
since 1880
Gender Distribution for Ja
Ja is a genuinely unisex name, used for both males (68.7%) and females (31.3%). Out of 435 total births registered, 299 were male and 136 were female.
Ja as a male name
Ranked #9,323 in 2024
8 male births in 2024
Peak: 1999 (20 births)
Ja as a female name
Ranked #18,719 in 2007
5 female births in 2007
Peak: 2000 (14 births)
Ja: Popularity Over Time
SSA records for Ja span from the 1950s to the 2020s, covering 8 decades of naming data. The most popular decade for this name was the 2000s, when 125 babies were registered. Ja has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Ja by Decade
How has Ja 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.
Ja + Last Name Combinations
How many people share a full name with Ja as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Ja
Other first names starting with J with a similar number of bearers.
Ja: Questions and Answers
How many people in the U.S. are named Ja?
We estimate approximately 417 people named Ja 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 821,953 Americans share this first name.
Is Ja a common name?
Ja is classified as "Very Rare" and is more popular than 82.7% of all first names in the SSA database. A total of 435 births have been registered with this name since 1880.
When was Ja most popular?
Ja reached peak popularity in 2000, when 29 babies were given this name. The average age of a living person named Ja is approximately 32 years old, reflecting when the name was most commonly given.
Is Ja a male name?
Ja is predominantly male. 68.7% of people with this name are male. See the gender breakdown above for full details.
How many Ja Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Ja Smith, Ja Johnson, Ja 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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