Kelsey has been given to about 155,738 people in the United States since 1880. It was most common in 1992, which makes it a Gen X and millennial name.
Kelsey ranks 814th among American girls in 2025, with 349 born that year. Its best year was 1992, when 11,882 babies were given the name, ranking 23rd. The typical living American called Kelsey is about 32 years old today. It is relatively most common in Maryland, 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.