Kathleen is a moderately popular girls' name in United States, ranking #237 in 2001 with 1,337 recorded births. The name reached its all-time peak in 1996 with 2,107 births ranking #152. Since 1996, the popularity has decreased by 36.5%. In 2001, approximately 1 in every 1,347 girls born was named Kathleen. FALLING Recent data shows the name is currently falling.