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