Foster has been given to about 13,408 people in the United States since 1880. It was most common in 2025, which makes it a current name.
Foster ranks 901st among American boys in 2025, with 278 born that year. Its best year was 2025, when 278 babies were given the name, ranking 901st. The typical living American called Foster is about 23 years old today. It is relatively most common in Louisiana, where it accounts for 0.03% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.