Katy is a distinctive girls' name in United States, ranking #881 in 1999 with 243 recorded births. The name reached its all-time peak in 1997 with 279 births ranking #758. Since 1996, the popularity has decreased by 11.3%. In 1999, approximately 1 in every 7,300 girls born was named Katy. FALLING Recent data shows the name is currently falling.