Allyson has been given to about 53,779 people in the United States since 1880. It was most common in 1998, which makes it a Gen X and millennial name.
Its best year was 1998, when 1,651 babies were given the name, ranking 186th. The typical living American called Allyson is about 28 years old today. It is relatively most common in Florida, where it accounts for 0.02% 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.