Feminine dossier · first seen 1906
Jill
Endangered
Down 99.7% from peak
Peak era
1966
Peak births
7,871
Current vitality
Rare
Peak generation
Gen X
Quick answers about Jill
How many people are named Jill?
An estimated 164,613 living Americans are named Jill.
How rare is Jill?
Jill is very rare among babies today, with 21 girls receiving the name in 2025, down 99.7% from its 1966 peak.
How old is the typical Jill?
The median age of a living American named Jill is approximately 57 years, with most bearers falling between 49 and 64 years old.
Is Jill still popular?
No. Jill is endangered as a baby name, down 99.7% from its 1966 peak with 21 births in 2025.
Where is Jill most common?
Jill has its strongest geographic signal in Iowa, where it appears 4.1× more often than the national baseline.
1906Peak 19662025
Peak year
1966
Decline from peak
99.7%
2025
21
All-time
208,071
Where it lives now
Jill is most concentrated in Iowa — about 3.6× the national rate in the 1990s.
States where Jill is given more often than the national average — its present-day heartland.