Demi is a moderately popular girls' name in United States, ranking #368 in 2021 with 843 recorded births. The name reached its all-time peak in 2020 with 913 births ranking #339. Since 1996, the popularity has increased by 142.9%. In 2021, approximately 1 in every 1,945 girls born was named Demi. FALLING Recent data shows the name is currently falling.