Katy is a moderately popular girls' name in England & Wales, ranking #219 in 2007 with 236 recorded births. The name reached its all-time peak in 1996 with 413 births ranking #111. Since 1996, the popularity has decreased by 42.9%. In 2007, approximately 1 in every 1,297 girls born was named Katy. FALLING Recent data shows the name is currently falling.