Hadley has been given to about 48,691 people in the United States since 1880. It was most common in 2014, which makes it a millennial-parent name.
Hadley ranks 121st among American girls in 2025, with 2,266 born that year. Its best year was 2014, when 3,060 babies were given the name, ranking 100th. The typical living American called Hadley is about 10 years old today. It is relatively most common in Montana, where it accounts for 0.38% 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.