Delta is a distinctive girls' name in United States, ranking #8365 in 2006 with 14 recorded births. The name reached its all-time peak in 2019 with 136 births ranking #1571. Since 1996, the popularity has decreased by 12.5%. In 2006, approximately 1 in every 135,791 girls born was named Delta. FALLING Recent data shows the name is currently falling.