Compare two names
Sydney and Sidney side by side: Sydney peaked in 2000 and Sidney in 1918; in 2025 they were given to 893 and 251 babies.
Sydney and Sidney, year by year
Girls and boys together; Sydney solid, Sidney dashed.
| Sydney | Sidney | |
|---|---|---|
| Births 2025 | 893 | 251 |
| Rank 2025 | #348 among girls’ names | #1,327 among boys’ names |
| Recorded since 1880 | 187,700 | 108,987 |
| Peak year | 2000 | 1918 |
| Girls | 95% | 23% |
| Alive, estimated | 178,000 | 54,800 |
| Median age | 24 | 35 |
Both names: SSA national file, published May 8, 2026, and SSA’s cohort life tables.