Keith has been given to about 440,123 people in the United States since 1880. It was most common in 1957, which makes it a midcentury name.
Keith ranks 801st among American boys in 2025, with 311 born that year. Its best year was 1957, when 12,483 babies were given the name, ranking 36th. The typical living American called Keith is about 58 years old today. It is relatively most common in South Carolina, 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.