Kay is a distinctive girls' name in England & Wales, ranking #5927 in 2025 with 3 recorded births. The name reached its all-time peak in 1996 with 66 births ranking #448. Since 1996, the popularity has decreased by 95.5%. In 2025, approximately 1 in every 84,427 girls born was named Kay. STABLE Recent data shows the name is currently stable.