Kay is a distinctive girls' name in United States, ranking #3391 in 2022 with 47 recorded births. The name reached its all-time peak in 2002 with 79 births ranking #2129. Since 1996, the popularity has decreased by 29.9%. In 2022, approximately 1 in every 34,867 girls born was named Kay. FALLING Recent data shows the name is currently falling.