Kay is a distinctive girls' name in United States, ranking #3345 in 2023 with 48 recorded births. The name reached its all-time peak in 2002 with 79 births ranking #2129. Since 1996, the popularity has decreased by 28.4%. In 2023, approximately 1 in every 33,388 girls born was named Kay. FALLING Recent data shows the name is currently falling.