Sidney is a distinctive boys' name in United States, ranking #1374 in 2024 with 137 recorded births. The name reached its all-time peak in 1997 with 383 births ranking #523. Since 1996, the popularity has decreased by 63.5%. In 2024, approximately 1 in every 12,521 boys born was named Sidney. STABLE Recent data shows the name is currently stable.
Sidney is an English surname name that later moved into first-name use. Its modern identity comes more from that surname history than from a single neat word meaning.
Behind the Name says it first became a given name in honour of Algernon Sidney, and later usage was shaped by other notable bearers of the surname. In the United States it also shifted across gender lines over time.