Delta is a distinctive girls' name in United States, ranking #4929 in 2014 with 28 recorded births. This places Delta in the top 26% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2019 with 136 births ranking #1571. Since 1996, the popularity has increased by 75.0%. In 2014, approximately 1 in every 63,783 girls born was named Delta. FALLING Recent data shows the name is currently falling.