Feminine dossier · first seen 1931
Brook
Endangered
Down 92.1% from peak
Peak era
1980
Peak births
405
Current vitality
Rare
Peak generation
Gen X
Quick answers about Brook
How many people are named Brook?
An estimated 10,135 living Americans are named Brook.
How rare is Brook?
Brook is very rare among babies today, with 32 girls receiving the name in 2025, down 92.1% from its 1980 peak.
How old is the typical Brook?
The median age of a living American named Brook is approximately 33 years, with most bearers falling between 25 and 45 years old.
Is Brook still popular?
No. Brook is endangered as a baby name, down 92.1% from its 1980 peak with 32 births in 2025.
Where is Brook most common?
Brook has its strongest geographic signal in Utah, where it appears 5.3× more often than the national baseline.
1931Peak 19802025
Peak year
1980
Decline from peak
92.1%
2025
32
All-time
10,630
Where it lives now
Brook is most concentrated in Indiana — about 2.7× the national rate in the 1990s.
States where Brook is given more often than the national average — its present-day heartland.