Millie is a girl name with a modern feel, drawn from real birth records. Below you'll find what Millie means and where it comes from, plus how many babies have been named Millie across the United States, UK, Ireland and New Zealand, how popular Millie has been over the decades, and the year it peaked.
Millie is a girl name of Germanic origin meaning “industrious or gentle strength”. A pet form of Millicent, Mildred, or Amelia.
| Country | Births on record |
|---|---|
| United States since 1880 | 46,138 births |
| England & Wales since 1996 | 43,971 births |
| Scotland since 1974 | 4,739 births |
| Northern Ireland since 1997 | 313 births |
| Ireland since 1964 | 2,406 births |
| New Zealand top 100, since 1954 | 1,331 births |
Counts come from official national birth-registration statistics: U.S. Social Security Administration, England & Wales (Office for National Statistics), Scotland (National Records of Scotland), Northern Ireland (NISRA), Ireland (Central Statistics Office) and New Zealand (Dept. of Internal Affairs). Coverage spans differ, so totals aren't directly comparable across countries.
Babies named Millie per year, United States (1880 to 2025). United States peaked in 2025 (3,353/yr) · England & Wales peaked in 2004 (2,421/yr) · Scotland peaked in 2013 (297/yr) · Ireland peaked in 2022 (206/yr) · Northern Ireland peaked in 2022 (28/yr).
Millie has been a fairly common baby name in the United States. It was most common in 2025, when it ranked #183 nationally (given to 4,747 babies that year), and a popular choice in the 2020s.
Mila · Molly · Milo · Miley · Mollie · Malia · Mellie · Mylee
Not sure if it's the one? The best way to know is to see if your partner loves it too. Swipe baby names with your partner and match on the ones you both ❤️, free, no account needed to start.
Find your name together →