Katy is a moderately popular girls' name in England & Wales, ranking #181 in 2005 with 280 recorded births. The name reached its all-time peak in 1996 with 413 births ranking #111. Since 1996, the popularity has decreased by 32.2%. In 2005, approximately 1 in every 1,029 girls born was named Katy. FALLING Recent data shows the name is currently falling.