Tiernan Boy
How popular is Tiernan?
#3,756 boy name in 2025
29 baby boys were named Tiernan in the US in 2025, making it the 3756th most popular boy name.
1,655living people named Tiernan (est.)
18median age of people named Tiernan
1,676babies named Tiernan since 1880
1 in 114,322US babies born in 2025
Tiernan popularity over time
Boys Girls
| Rank in 2025 | #3,756 for boys (▲ 313 from 2024) |
|---|---|
| Babies in 2025 | 29 boys |
| 10-year trend | Falling (-37% babies vs 2015) |
| Earlier ranks | #2,640 in 2015, #4,694 in 2020 |
| Peak year | 2007 (86 boys) |
| Highest rank | #1,728 in 2007 |
| First recorded | 1985 |
| Boys vs girls (last 10 years) | 95% boys, 5% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Where Tiernan is most popular
Babies named Tiernan per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
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- Pennsylvania: 0.0 per 1,000 (6 boys)
- California: 0.0 per 1,000 (5 boys)
Tiernan by decade
Boy names about as popular as Tiernan
Questions
- Is Tiernan a boy or girl name?
- Tiernan is mostly a boy name. Over the last 10 years, 95% of babies named Tiernan were boys.
- How popular is the name Tiernan?
- 29 baby boys were named Tiernan in the US in 2025, making it the 3756th most popular boy name.
- When was Tiernan most popular?
- Tiernan peaked in 2007, when 86 boys were given the name. Its highest rank was #1,728 in 2007.
- How many people are named Tiernan?
- 1,676 babies have been named Tiernan in the US since 1880. We estimate about 1,655 of them are alive in 2026, with a median age of 18.
- Where is Tiernan most popular?
- From 2021 to 2025, Tiernan was most common in Pennsylvania, 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.