Foster is a distinctive boys' name in United States, ranking #1352 in 2010 with 126 recorded births. This places Foster in the top 9% 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 55.6%. In 2010, approximately 1 in every 15,225 boys born was named Foster. RISING Recent data shows the name is currently rising.