Girls' name · peaked in 2000
Sydney name popularity since 1925
184,431 babies born in the US from 1925 to 2025 were named Sydney (96.4% girls, 3.6% boys). Half of them were born in 2002 or earlier, so the typical Sydney is about 24 years old in 2026. Sydney peaked in 2000 as the #23 name for girls, and it ranked #348 in 2025.
Key facts
- US babies since 1925
- 184,431
- Named Sydney, 1925–2025
- In 2025
- #348
- for girls in 2025 (873 babies)
- Girls / boys
- 96.4% girls
- 177,749 girls · 6,682 boys
- Most popular in
- Utah
- 1.78× its national share
Peak year is the year Sydney made up the largest share of US girls, in records going back to 1880. Typical age is based on births from 1925 on, not on who is living today.
Sydney births per year, 1925–2025
2000 was the biggest year for Sydney both by count and as a share of all babies.
- Steepest fall: Between 1952 and 1957, Sydney's share of baby girls fell by 49%, from 1 in 8,960 to 1 in 17,500.
- Fastest rise: Between 1986 and 1991, it became 4.7× more common, from 1 in 3,700 baby girls to 1 in 788.
Shaded on the chart. Both compare Sydney's share of all US girls five years apart, counting only years with at least 100 babies named Sydney.
Decade by decade
Babies named Sydney in each decade, and its rank among girls' names in the middle year of the decade (1935, 1945 … 2025).
| Decade | Girls | Boys | Rank |
|---|---|---|---|
| 1925–29 | 145 | 541 | – |
| 1930s | 798 | 827 | #690 |
| 1940s | 1,512 | 815 | #639 |
| 1950s | 1,522 | 631 | #841 |
| 1960s | 1,346 | 504 | #768 |
| 1970s | 929 | 356 | #1,239 |
| 1980s | 4,587 | 457 | #479 |
| 1990s | 55,756 | 1,018 | #43 |
| 2000s | 76,444 | 844 | #30 |
| 2010s | 28,084 | 506 | #122 |
| 2020–25 | 6,626 | 183 | #348 |
Ranks count every name given to at least 5 girls that year, so they can go past 1,000.
Generation fingerprint
62.8% of babies named Sydney from 1925 to 2025 were born in the Gen Z years (1997–2012). The full split by generation:
Where Sydney is most popular
The index compares Sydney's share of babies in each state with its share nationwide, 1925–2025 (1.50× = 50% more common). States with at least 300 babies named Sydney.
| State | Index | Babies |
|---|---|---|
| Utah | 1.78× | 2,697 |
| Nevada | 1.77× | 1,127 |
| Colorado | 1.54× | 3,395 |
| Idaho | 1.53× | 1,089 |
| Alaska | 1.48× | 393 |
Other spellings
Spellings that sound like Sydney and were given to at least 1,000 girls from 1925 to 2025, with the year each one was most popular.
| Spelling | Girls | Peak year |
|---|---|---|
| Sydney (this page) | 177,749 | 2000 |
| Sydnee | 8,255 | 2003 |
| Sydni | 5,361 | 2000 |
| Sydnie | 5,187 | 2000 |
Names with a similar story
Of the other 499 names on this site, these six had the share of babies closest in shape to Sydney's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Sydney.
Names from the same era
Other common names that peaked within two years of Sydney (2000).
Source: U.S. Social Security Administration national and state baby-name data, which covers names given to at least 5 babies of one sex in a year. About the data