Foster is a distinctive boys' name in United States, ranking #1159 in 1999 with 113 recorded births. This places Foster in the top 10% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 264 births ranking #901. Since 1996, the popularity has increased by 39.5%. In 1999, approximately 1 in every 16,992 boys born was named Foster. RISING Recent data shows the name is currently rising.