Deegan has been given to about 3,465 people in the United States since 1880. It was most common in 2011, which makes it a millennial-parent name.
Its best year was 2011, when 259 babies were given the name, ranking 835th. The typical living American called Deegan is about 14 years old today. It is relatively most common in Pennsylvania, 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.