How Many People Are Named Seiji?
people named Seiji are alive in the United States today (estimate)
About 1 in 852,331 people in the US has this name
Based on 517 babies named Seiji in Social Security records from 1914 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
19 births
Trend
Stable (last 10 years)
⚧ Gender Distribution
All of the babies given the name Seiji in the records were boys.
👥 Age Distribution
The average person named Seiji alive today is about 22 years old, and 76% are under 30. Half of them were between 11 and 29 in 2025.
📈 Popularity Over Time
Seiji first appears in the records in 1914 and was given most often in 2007, to 19 babies. In 2025, 8 babies got the name.
Babies given the name each year, 1914 to 2025
🏆 Rank History
Seiji has never been one of the 100 most popular boys' names. Its best rank was #2,563, in 1925. In 2025 it ranked #9,565.
| Boys | |
|---|---|
| Rank in 2025 | #9,565 |
| Best rank | #2,563 (1925) |
| Years in the top 100 | None |
| Rank in its biggest decade | #6,411 in the 2000s |
📍 State-Wise Distribution
People named Seiji alive today, by the state where they were born (estimate; state records start in 1910).
More people named Seiji were born in California than in any other state: about 25 of those alive today.
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