Kathleen is a moderately popular girls' name in United States, ranking #339 in 2005 with 934 recorded births. The name reached its all-time peak in 1996 with 2,107 births ranking #152. Since 1996, the popularity has decreased by 55.7%. In 2005, approximately 1 in every 1,978 girls born was named Kathleen. FALLING Recent data shows the name is currently falling.