Sergei is a distinctive boys' name in United States, ranking #13577 in 2025 with 5 recorded births. This places Sergei in the bottom 3% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 16 births ranking #4378. Since 1996, the popularity has decreased by 61.5%. In 2025, approximately 1 in every 341,615 boys born was named Sergei. STABLE Recent data shows the name is currently stable.