Delta is a distinctive girls' name in United States, ranking #1715 in 2020 with 118 recorded births. The name reached its all-time peak in 2019 with 136 births ranking #1571. Since 1996, the popularity has increased by 637.5%. In 2020, approximately 1 in every 13,691 girls born was named Delta. FALLING Recent data shows the name is currently falling.