How Many People Are Named Sinjin?
An estimated 369 people in the United States have the first name Sinjin. It is almost exclusively a male name. The average bearer is 25 years old, and Sinjin peaked in popularity in 1992 with 25 births that year.
Below you will find a full statistical profile of Sinjin 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 Sinjin paired with any surname.
Estimated Living Americans
369
About 1 in 928,874 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
25
years old
Peak Year
1992
25 births
Total Registered
376
since 1880
Gender Distribution for Sinjin
Sinjin is almost exclusively a male name. Out of 376 total births registered, 100.0% were male.
Sinjin as a male name
Ranked #14,031 in 2022
5 male births in 2022
Peak: 1992 (25 births)
Sinjin: Popularity Over Time
SSA records for Sinjin span from the 1980s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 1990s, when 183 babies were registered. Sinjin has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Sinjin by Decade
How has Sinjin 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.
Sinjin by State
Sinjin + Last Name Combinations
How many people share a full name with Sinjin as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Sinjin
Other first names starting with S with a similar number of bearers.
Sinjin: Questions and Answers
How many people in the U.S. are named Sinjin?
We estimate approximately 369 people named Sinjin 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 928,874 Americans share this first name.
Is Sinjin a common name?
Sinjin is classified as "Very Rare" and is more popular than 81.5% of all first names in the SSA database. A total of 376 births have been registered with this name since 1880.
When was Sinjin most popular?
Sinjin reached peak popularity in 1992, when 25 babies were given this name. The average age of a living person named Sinjin is approximately 25 years old, reflecting when the name was most commonly given.
Is Sinjin a male name?
Sinjin is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Sinjin Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Sinjin Smith, Sinjin Johnson, Sinjin 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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