Demi has been given to about 14,921 people in the United States since 1880. It was most common in 2020, which makes it a current name.
Demi ranks 381st among American girls in 2025, with 811 born that year. Its best year was 2020, when 914 babies were given the name, ranking 339th. The typical living American called Demi is about 10 years old today. It is relatively most common in Louisiana, where it accounts for 0.17% 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.