Kaylynn has been given to about 12,257 people in the United States since 1880. It was most common in 2009, which makes it a millennial-parent name.
Its best year was 2009, when 590 babies were given the name, ranking 513th. The typical living American called Kaylynn is about 19 years old today. It is relatively most common in Ohio, where it accounts for 0.01% of births.
Source: US Social Security Administration, national and state name files, 2025 release. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.