Delta is a distinctive girls' name in United States, ranking #2337 in 2025 with 78 recorded births. The name reached its all-time peak in 2019 with 136 births ranking #1571. Since 1996, the popularity has increased by 387.5%. In 2025, approximately 1 in every 20,606 girls born was named Delta. FALLING Recent data shows the name is currently falling.