Kasai Boy
How popular is Kasai?
#639 boy name in 2025
437 baby boys were named Kasai in the US in 2025, making it the 639th most popular boy name. Another 7 girls got the name (#11,928 for girls).
Kasai popularity over time
Boys Girls
| Rank in 2025 | #639 for boys (▲ 1096 from 2024) |
|---|---|
| Babies in 2025 | 437 boys, 7 girls |
| 10-year trend | Rising fast (+2813% babies vs 2015) |
| Earlier ranks | #5,742 in 2015, #2,466 in 2020 |
| Peak year | 2025 (437 boys) |
| Highest rank | #639 in 2025 |
| First recorded | 1996 |
| Boys vs girls (last 10 years) | 98% boys, 2% girls |
| Chance a classmate shares it | 0.3% in a class of 25 kids born in 2025 |
Kasai counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Kasai family of names ranked #578 for boys in 2025 (#1,409 the year before), with 478 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Kasai | 437 | 91% |
| Casai | 21 | 4% |
| Kazai | 13 | 3% |
| Kahsai | 7 | 1% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Kasai is most popular
Babies named Kasai per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- Delaware: 0.9 per 1,000 (14 boys)
- Pennsylvania: 0.2 per 1,000 (64 boys)
- New Jersey: 0.2 per 1,000 (31 boys)
- Mississippi: 0.1 per 1,000 (8 boys)
- New York: 0.1 per 1,000 (59 boys)
Kasai by decade
Boy names about as popular as Kasai
Questions
- Is Kasai a boy or girl name?
- Kasai is mostly a boy name. Over the last 10 years, 98% of babies named Kasai were boys.
- How popular is the name Kasai?
- 437 baby boys were named Kasai in the US in 2025, making it the 639th most popular boy name. Another 7 girls got the name (#11,928 for girls).
- When was Kasai most popular?
- Kasai peaked in 2025, when 437 boys were given the name. Its highest rank was #639 in 2025.
- How many people are named Kasai?
- 1,083 babies have been named Kasai in the US since 1880. We estimate about 1,079 of them are alive in 2026, with a median age of 3.
- Where is Kasai most popular?
- From 2021 to 2025, Kasai was most common in Delaware, at 0.9 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.