Masculine dossier · first seen 1880
Sidney
Endangered
Down 92.2% from peak
Peak era
1918
Peak births
1,879
Current vitality
Fragile
Peak generation
Greatest Generation
Quick answers about Sidney
How many people are named Sidney?
An estimated 31,084 living Americans are named Sidney.
How rare is Sidney?
Sidney is uncommon among babies today, with 146 boys receiving the name in 2025, down 92.2% from its 1918 peak.
How old is the typical Sidney?
The median age of a living American named Sidney is approximately 56 years, with most bearers falling between 32 and 70 years old.
Is Sidney still popular?
No. Sidney is endangered as a baby name, down 92.2% from its 1918 peak with 146 births in 2025.
Where is Sidney most common?
Sidney has its strongest geographic signal in Louisiana, where it appears 4.4× more often than the national baseline.
1880Peak 19182025
Peak year
1918
Decline from peak
92.2%
2025
146
All-time
84,202
Where it lives now
Sidney is most concentrated in Louisiana — about 4.2× the national rate in the 2000s.
States where Sidney is given more often than the national average — its present-day heartland.