Kiernan Boy & girl
How popular is Kiernan?
#3,378 boy name in 2025
34 baby boys were named Kiernan in the US in 2025, making it the 3378th most popular boy name. Another 9 girls got the name (#10,104 for girls).
2,408living people named Kiernan (est.)
20median age of people named Kiernan
2,448babies named Kiernan since 1880
1 in 77,101US babies born in 2025
Kiernan popularity over time
Boys Girls
| Rank in 2025 | #3,378 for boys (▼ 275 from 2024) |
|---|---|
| Babies in 2025 | 34 boys, 9 girls |
| 10-year trend | Falling (-15% babies vs 2015) |
| Earlier ranks | #2,918 in 2015, #3,342 in 2020 |
| Peak year | 2008 (77 boys) |
| Highest rank | #1,677 in 2000 |
| First recorded | 1957 |
| Boys vs girls (last 10 years) | 69% boys, 31% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Where Kiernan is most popular
Babies named Kiernan per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFL
- Massachusetts: 0.0 per 1,000 (5 boys)
- New York: 0.0 per 1,000 (5 boys)
- Florida: 0.0 per 1,000 (5 boys)
Kiernan by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1950s | 5 | #3,992 |
| 1960s | 9 | #3,061 |
| 1970s | 20 | #4,722 |
| 1980s | 88 | #3,334 |
| 1990s | 338 | #1,813 |
| 2000s | 645 | #1,677 |
| 2010s | 449 | #1,912 |
| 2020s | 207 | #2,971 |
Boy names about as popular as Kiernan
Questions
- Is Kiernan a boy or girl name?
- Kiernan is used for both. Over the last 10 years, 69% of babies named Kiernan were boys and 31% were girls.
- How popular is the name Kiernan?
- 34 baby boys were named Kiernan in the US in 2025, making it the 3378th most popular boy name. Another 9 girls got the name (#10,104 for girls).
- When was Kiernan most popular?
- Kiernan peaked in 2008, when 77 boys were given the name. Its highest rank was #1,677 in 2000.
- How many people are named Kiernan?
- 2,448 babies have been named Kiernan in the US since 1880. We estimate about 2,408 of them are alive in 2026, with a median age of 20.
- Where is Kiernan most popular?
- From 2021 to 2025, Kiernan was most common in Massachusetts, at 0.0 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.