Justus has been given to about 9,958 people in the United States since 1880. It was most common in 2002, which makes it a millennial-parent name.
Its best year was 2002, when 336 babies were given the name, ranking 647th. The typical living American called Justus is about 20 years old today. It is relatively most common in Virginia, 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.