Kathleen is a moderately popular girls' name in United States, ranking #371 in 2006 with 878 recorded births. The name reached its all-time peak in 1996 with 2,107 births ranking #152. Since 1996, the popularity has decreased by 58.3%. In 2006, approximately 1 in every 2,165 girls born was named Kathleen. FALLING Recent data shows the name is currently falling.