By decade. Change compares yearly averages, so the current partial decade is on equal
footing. Best rank is the name's best yearly rank within the decade.
Where Sidney is most popular
Boys named Sidney per 1,000 boys born in
each state, 2021–2025. National average: 0.086 per 1,000.
Strongest in Massachusetts, Louisiana, and New York.
Vs national average well below below near national above well above no data
All 50 states and DC, sorted by rate. Counts are boys named Sidney born
2021–2025; the per-1,000 rate makes states of different sizes
comparable, and the last column shows each state against the national average.
State counts come from the Social Security Administration's state files, which omit any
state-year with fewer than five babies of a name, so small states can undercount slightly.
The story of Sidney
Sidney is uncommon for boys in the United States, ranked #1,327 in 2025 with 146 babies given the name. It is currently holding steady compared with a decade ago.
Since 1880, 108,987 American babies have been named Sidney, about 77% boys and 23% girls, making it a genuinely unisex name. Its peak came in 1918, when 1,939 newborns received the name, the signature sound of the 1910s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Sidney stood among all boys' names in any year, or use the compare tool to plot it against other names.
