Delta is a distinctive girls' name in United States, ranking #1927 in 2018 with 103 recorded births. The name reached its all-time peak in 2019 with 136 births ranking #1571. Since 1996, the popularity has increased by 543.8%. In 2018, approximately 1 in every 16,509 girls born was named Delta. FALLING Recent data shows the name is currently falling.