Kathleen is a moderately popular girls' name in United States, ranking #448 in 2008 with 704 recorded births. The name reached its all-time peak in 1996 with 2,107 births ranking #152. Since 1996, the popularity has decreased by 66.6%. In 2008, approximately 1 in every 2,686 girls born was named Kathleen. FALLING Recent data shows the name is currently falling.