Millie
Gender: Girl
Meaning: Gentle strength, industrious
Origin: English (diminutive)
Popularity: Ranked #73 in 2025 with 3,353 babies born.
History: A diminutive of Mildred (gentle strength), Millicent (industrious), or Camille. It was popular in the Victorian era and has seen a massive revival. Actress Millie Bobby Brown of 'Stranger Things' boosted it further.
Name length: 6 letters
How common is Millie? About 1 in 993 babies born in 2025 were named Millie, or roughly 9.2 per day in the United States.
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Frequently asked about Millie
What does the name Millie mean?
Millie means “Gentle strength, industrious” from English (diminutive) roots.
What is the origin of the name Millie?
Millie has English (diminutive) origin. The traditional meaning is “Gentle strength, industrious”.
How popular is Millie?
Millie ranked #73 in 2025 — given to 3,353 babies that year.
When was Millie most popular?
Millie peaked in 2025 with 3,353 babies registered that year.
Is Millie a boy or girl name?
Millie is predominantly a girls' name — over 90% of Millies in registered births are female.
Is the name Millie rising or falling in popularity?
Millie has risen 117 spots in the rankings over the last 5 years — from #190 in 2020 to #73 in 2025.
How long has Millie been recorded?
Millie appears in birth records across 146 years — from 1880 through 2025.