Feminine dossier · first seen 1880
Millie
Rising
Gaining cultural share
Peak era
2025
Peak births
3,353
Current vitality
Healthy
Peak generation
Gen Alpha
Quick answers about Millie
How many people are named Millie?
An estimated 27,199 living Americans are named Millie.
How rare is Millie?
Millie is moderately uncommon among babies today, with 3,353 girls receiving the name in 2025, matching its recorded peak.
How old is the typical Millie?
The median age of a living American named Millie is approximately 6 years, with most bearers falling between 3 and 15 years old.
Is Millie still popular?
Yes — Millie is currently rising in popularity, with 3,353 births in 2025. Births this decade are running about 5× higher than the previous decade.
Where is Millie most common?
Millie has its strongest geographic signal in Utah, where it appears 5.4× more often than the national baseline.
1880Peak 20252025
Peak year
2025
Decline from peak
0%
2025
3,353
All-time
45,926
Where it lives now
Millie is most concentrated in North Dakota — about 4.1× the national rate in the 2020s.
States where Millie is given more often than the national average — its present-day heartland.