Kacey has been given to about 15,265 people in the United States since 1880. It was most common in 1991, which makes it a Gen X and millennial name.
Its best year was 1991, when 463 babies were given the name, ranking 577th. The typical living American called Kacey is about 28 years old today. It is relatively most common in Mississippi, where it accounts for 0.06% 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.