Katy is a moderately popular girls' name in England & Wales, ranking #157 in 2002 with 276 recorded births. The name reached its all-time peak in 1996 with 413 births ranking #111. Since 1996, the popularity has decreased by 33.2%. In 2002, approximately 1 in every 969 girls born was named Katy. FALLING Recent data shows the name is currently falling.