Milly Girl
How popular is Milly?
#1,777 girl name in 2025
113 baby girls were named Milly in the US in 2025, making it the 1777th most popular girl name.
Milly popularity over time
| Rank in 2025 | #1,777 for girls (▲ 19 from 2024) |
|---|---|
| Babies in 2025 | 113 girls |
| 10-year trend | Rising (+28% babies vs 2015) |
| Earlier ranks | #2,152 in 2015, #1,872 in 2020 |
| Peak year | 2014 (129 girls) |
| Highest rank | #686 in 1884 |
| First recorded | 1884 |
| Boys vs girls (last 10 years) | 0% boys, 100% girls |
| Chance a classmate shares it | 0.1% in a class of 25 kids born in 2025 |
Milly counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Millie family of names ranked #59 for girls in 2025 (#71 the year before), with 4,713 babies in all.
| Spelling | Girls in 2025 | Share |
|---|---|---|
| Millie | 3,353 | 71% |
| Miley | 900 | 19% |
| Milly | 113 | 2% |
| Mylee | 115 | 2% |
| Mylie | 58 | 1% |
| Myleigh | 54 | 1% |
| Milli | 33 | 1% |
| Millee | 24 | 1% |
| Mili | 19 | 0% |
| Mily | 9 | 0% |
| Milee | 8 | 0% |
| Mileigh | 9 | 0% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Milly is most popular
Babies named Milly per 1,000 girls born in each state, 2021 to 2025. Darker means more common.
- Utah: 0.1 per 1,000 (12 girls)
- Nevada: 0.1 per 1,000 (5 girls)
- Oklahoma: 0.1 per 1,000 (6 girls)
- California: 0.1 per 1,000 (68 girls)
- Florida: 0.1 per 1,000 (29 girls)
Milly by decade
| Decade | Baby girls | Best rank |
|---|---|---|
| 1880s | 15 | #686 |
| 1890s | 32 | #1,277 |
| 1900s | 10 | #1,678 |
| 1910s | 114 | #1,620 |
| 1920s | 177 | #1,810 |
| 1930s | 134 | #1,685 |
| 1940s | 116 | #2,148 |
| 1950s | 123 | #2,759 |
| 1960s | 132 | #2,423 |
| 1970s | 79 | #4,091 |
| 1980s | 86 | #5,075 |
| 1990s | 118 | #4,864 |
| 2000s | 514 | #1,844 |
| 2010s | 1,024 | #1,652 |
| 2020s | 673 | #1,730 |
Girl names about as popular as Milly
Questions
- Is Milly a boy or girl name?
- Milly is mostly a girl name. Over the last 10 years, 100% of babies named Milly were girls.
- How popular is the name Milly?
- 113 baby girls were named Milly in the US in 2025, making it the 1777th most popular girl name.
- When was Milly most popular?
- Milly peaked in 2014, when 129 girls were given the name. Its highest rank was #686 in 1884.
- How many people are named Milly?
- 3,347 babies have been named Milly in the US since 1880. We estimate about 2,807 of them are alive in 2026, with a median age of 13.
- Where is Milly most popular?
- From 2021 to 2025, Milly was most common in Utah, at 0.1 of every 1,000 girls born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.