Demarcus has been given to about 13,647 people in the United States since 1880. It was most common in 1991, which makes it a Gen X and millennial name.
Its best year was 1991, when 511 babies were given the name, ranking 436th. The typical living American called Demarcus is about 31 years old today. It is relatively most common in Mississippi, where it accounts for 0.03% of births.
Source: US Social Security Administration, national and state name files, 2025 release. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.