Brook Boy & girl
How popular is Brook?
#4,351 girl name in 2025
32 baby girls were named Brook in the US in 2025, making it the 4351st most popular girl name. Another 15 boys got the name (#5,859 for boys).
Brook popularity over time
Boys Girls
| Rank in 2025 | #4,351 for girls (▲ 1089 from 2024) |
|---|---|
| Babies in 2025 | 32 girls, 15 boys |
| 10-year trend | Falling fast (-55% babies vs 2015) |
| Earlier ranks | #2,524 in 2015, #3,546 in 2020 |
| Peak year | 1980 (405 girls) |
| Highest rank | #503 in 1980 |
| First recorded | 1931 |
| Boys vs girls (last 10 years) | 26% boys, 74% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Brook counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Brooke family of names ranked #326 for girls in 2025 (#324 the year before), with 1,004 babies in all.
| Spelling | Girls in 2025 | Share |
|---|---|---|
| Brooke | 972 | 97% |
| Brook | 32 | 3% |
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 Brook is most popular
Babies named Brook per 1,000 girls born in each state, 2021 to 2025. Darker means more common.
- California: 0.0 per 1,000 (23 girls)
Brook by decade
| Decade | Baby girls | Best rank |
|---|---|---|
| 1930s | 5 | #4,329 |
| 1940s | 25 | #3,175 |
| 1950s | 107 | #2,970 |
| 1960s | 308 | #1,488 |
| 1970s | 1,857 | #584 |
| 1980s | 2,241 | #503 |
| 1990s | 3,009 | #635 |
| 2000s | 2,051 | #811 |
| 2010s | 828 | #1,679 |
| 2020s | 199 | #3,546 |
Girl names about as popular as Brook
Questions
- Is Brook a boy or girl name?
- Brook is used for both. Over the last 10 years, 26% of babies named Brook were boys and 74% were girls.
- How popular is the name Brook?
- 32 baby girls were named Brook in the US in 2025, making it the 4351st most popular girl name. Another 15 boys got the name (#5,859 for boys).
- When was Brook most popular?
- Brook peaked in 1980, when 405 girls were given the name. Its highest rank was #503 in 1980.
- How many people are named Brook?
- 14,021 babies have been named Brook in the US since 1880. We estimate about 13,330 of them are alive in 2026, with a median age of 36.
- Where is Brook most popular?
- From 2021 to 2025, Brook was most common in California, at 0.0 of every 1,000 girls 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.