Sidney Boy & girl
How popular is Sidney?
#1,872 girl name in 2025
105 baby girls were named Sidney in the US in 2025, making it the 1872nd most popular girl name. Another 146 boys got the name (#1,323 for boys).
Sidney popularity over time
Boys Girls
| Rank in 2025 | #1,872 for girls (▼ 140 from 2024) |
|---|---|
| Babies in 2025 | 105 girls, 146 boys |
| 10-year trend | Falling fast (-61% babies vs 2015) |
| Earlier ranks | #997 in 2015, #1,510 in 2020 |
| Peak year | 2000 (1,221 girls) |
| Highest rank | #258 in 1999 |
| First recorded | 1880 |
| Boys vs girls (last 10 years) | 49% boys, 51% girls |
| Chance a classmate shares it | 0.2% in a class of 25 kids born in 2025 |
Sidney counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Sydney family of names ranked #324 for girls in 2025 (#270 the year before), with 1,009 babies in all.
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 Sidney is most popular
Babies named Sidney per 1,000 girls born in each state, 2021 to 2025. Darker means more common.
- Pennsylvania: 0.1 per 1,000 (35 girls)
- Maryland: 0.1 per 1,000 (15 girls)
- North Carolina: 0.1 per 1,000 (32 girls)
- New York: 0.1 per 1,000 (52 girls)
- Georgia: 0.1 per 1,000 (29 girls)
Sidney by decade
| Decade | Baby girls | Best rank |
|---|---|---|
| 1880s | 114 | #418 |
| 1890s | 170 | #559 |
| 1900s | 197 | #623 |
| 1910s | 438 | #803 |
| 1920s | 568 | #893 |
| 1930s | 697 | #693 |
| 1940s | 951 | #650 |
| 1950s | 892 | #883 |
| 1960s | 571 | #1,130 |
| 1970s | 327 | #2,081 |
| 1980s | 781 | #1,006 |
| 1990s | 6,964 | #258 |
| 2000s | 8,401 | #265 |
| 2010s | 2,894 | #670 |
| 2020s | 820 | #1,347 |
Girl names about as popular as Sidney
Questions
- Is Sidney a boy or girl name?
- Sidney is used for both. Over the last 10 years, 49% of babies named Sidney were boys and 51% were girls.
- How popular is the name Sidney?
- 105 baby girls were named Sidney in the US in 2025, making it the 1872nd most popular girl name. Another 146 boys got the name (#1,323 for boys).
- When was Sidney most popular?
- Sidney peaked in 2000, when 1,221 girls were given the name. Its highest rank was #258 in 1999.
- How many people are named Sidney?
- 108,987 babies have been named Sidney in the US since 1880. We estimate about 56,464 of them are alive in 2026, with a median age of 37.
- Where is Sidney most popular?
- From 2021 to 2025, Sidney was most common in Pennsylvania, 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.