Milly
Girl name · #1779 in 2025 · Very rare
How old is the name Milly? In official American birth records, Milly has been tracked continuously since 1884, giving it 141 years of documented American history.
Milly is currently the #1779 girl name in the United States — 113 babies received it in 2025. A decade ago it stood at #2152, so the name has been rising over the past ten years. Roughly one in every 15,929 girls born in 2025 was named Milly.
Babies named Milly per year. Source: Official national birth records.
The 141-year story
Milly first appears in the Social Security records in 1884, when 10 girls received the name. Its peak came in 2014, when 129 girls were named Milly — good for #1652 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Milly against up to 5 other names.
Uniqueness: will there be another Milly in class?
On our rarity read — which blends how common Milly is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Milly will likely be the only one in the room, with the occasional spelling-out as the price.
Where Milly is most common
State-level data for Milly is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Milly
Statistically, parents drawn to Milly tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Elly, Italy, Nelly, Mabry, and Keily.
EllyItalyNellyMabryKeilyMaizyJanellyMalky
Rank history (last 25 years)
| Year | Babies named Milly | Rank |
|---|---|---|
| 2025 | 113 | #1777 |
| 2024 | 112 | #1796 |
| 2023 | 110 | #1826 |
| 2022 | 116 | #1775 |
| 2021 | 119 | #1730 |
| 2020 | 103 | #1872 |
| 2019 | 103 | #1919 |
| 2018 | 108 | #1869 |
| 2017 | 103 | #1943 |
| 2016 | 113 | #1828 |
| 2015 | 88 | #2152 |
| 2014 | 129 | #1652 |
| 2013 | 108 | #1866 |
| 2012 | 95 | #2028 |
| 2011 | 82 | #2274 |
| 2010 | 95 | #2077 |
| 2009 | 78 | #2446 |
| 2008 | 116 | #1844 |
| 2007 | 46 | #3531 |
| 2006 | 53 | #3136 |
| 2005 | 39 | #3730 |
| 2004 | 40 | #3631 |
| 2003 | 48 | #3085 |
| 2002 | 32 | #3978 |
| 2001 | 31 | #4025 |
Frequently asked questions
How old is the name Milly?
In official American birth records, the name Milly first appeared in 1884 (over 141 years ago), when 10 newborn girls received the name. It has over a century of continuous American history.
Is Milly a popular girl name?
Milly ranked #1779 among girls in 2025 with 113 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #2152.
When was the name Milly most popular?
Milly peaked in 2014, when 129 American girls received the name (ranked #1652 that year). Since 2014 the name has declined from that high.
How rare is the name Milly?
In 2025, roughly 1 in 15,929 newborn American girls was named Milly. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.