Katy is a moderately popular girls' name in England & Wales, ranking #430 in 2012 with 107 recorded births. The name reached its all-time peak in 1996 with 413 births ranking #111. Since 1996, the popularity has decreased by 74.1%. In 2012, approximately 1 in every 3,010 girls born was named Katy. FALLING Recent data shows the name is currently falling.