Lydia is a popular girls' name in United States, ranking #92 in 2025 with 2,692 recorded births. The name reached its all-time peak in 2014 with 3,652 births ranking #84. Since 1996, the popularity has increased by 48.5%. In 2025, approximately 1 in every 597 girls born was named Lydia. STABLE Recent data shows the name is currently stable.