Kailee has been given to about 12,953 people in the United States since 1880. It was most common in 2003, which makes it a millennial-parent name.
Its best year was 2003, when 584 babies were given the name, ranking 493rd. The typical living American called Kailee is about 21 years old today. It is relatively most common in Georgia, where it accounts for 0.01% 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.