Millie
Quick answers about Millie
How many people are named Millie?
An estimated 28,616 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. It was the #73 girls’ name in 2025.
How old is the typical Millie?
The median age of a living American named Millie is approximately 7 years, with most bearers falling between 3 and 18 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 North Dakota, where it appeared 4.1× more often than the national baseline in the 2020s.
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.