Tilly Girl
How popular is Tilly?
#884 girl name in 2025
302 baby girls were named Tilly in the US in 2025, making it the 884th most popular girl name.
Tilly popularity over time
| Rank in 2025 | #884 for girls (▲ 68 from 2024) |
|---|---|
| Babies in 2025 | 302 girls |
| 10-year trend | Rising fast (+260% babies vs 2015) |
| Earlier ranks | #2,236 in 2015, #1,327 in 2020 |
| Peak year | 2025 (302 girls) |
| Highest rank | #884 in 2025 |
| First recorded | 1912 |
| Boys vs girls (last 10 years) | 0% boys, 100% girls |
| Chance a classmate shares it | 0.2% in a class of 25 kids born in 2025 |
Tilly counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Tilly family of names ranked #485 for girls in 2025 (#493 the year before), with 590 babies in all.
| Spelling | Girls in 2025 | Share |
|---|---|---|
| Tilly | 302 | 51% |
| Tillie | 177 | 30% |
| Tylee | 42 | 7% |
| Tyleigh | 22 | 4% |
| Tilley | 32 | 5% |
| Tylie | 15 | 3% |
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 Tilly is most popular
Babies named Tilly per 1,000 girls born in each state, 2021 to 2025. Darker means more common.
- South Dakota: 0.8 per 1,000 (11 girls)
- Oregon: 0.6 per 1,000 (39 girls)
- Kentucky: 0.6 per 1,000 (49 girls)
- North Dakota: 0.5 per 1,000 (6 girls)
- Tennessee: 0.4 per 1,000 (64 girls)
Tilly by decade
| Decade | Baby girls | Best rank |
|---|---|---|
| 1910s | 27 | #1,896 |
| 1920s | 20 | #4,723 |
| 1930s | 11 | #3,751 |
| 1940s | 6 | #3,861 |
| 1950s | 5 | #6,244 |
| 1960s | 18 | #5,292 |
| 1970s | 28 | #7,290 |
| 1980s | 5 | #11,320 |
| 1990s | 71 | #6,830 |
| 2000s | 184 | #3,799 |
| 2010s | 872 | #1,340 |
| 2020s | 1,452 | #884 |
Girl names about as popular as Tilly
Questions
- Is Tilly a boy or girl name?
- Tilly is mostly a girl name. Over the last 10 years, 100% of babies named Tilly were girls.
- How popular is the name Tilly?
- 302 baby girls were named Tilly in the US in 2025, making it the 884th most popular girl name.
- When was Tilly most popular?
- Tilly peaked in 2025, when 302 girls were given the name. Its highest rank was #884 in 2025.
- How many people are named Tilly?
- 2,699 babies have been named Tilly in the US since 1880. We estimate about 2,627 of them are alive in 2026, with a median age of 6.
- Where is Tilly most popular?
- From 2021 to 2025, Tilly was most common in South Dakota, at 0.8 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.