Ainsley has been given to about 20,896 people in the United States since 1880. It was most common in 2014, which makes it a millennial-parent name.
Ainsley ranks 483rd among American girls in 2025, with 629 born that year. Its best year was 2014, when 1,013 babies were given the name, ranking 337th. The typical living American called Ainsley is about 14 years old today. It is relatively most common in Maine, where it accounts for 0.10% 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.