Tierney is a distinctive girls' name in United States, ranking #3384 in 2015 with 48 recorded births. The name reached its all-time peak in 2000 with 110 births ranking #1616. Since 1996, the popularity has decreased by 52.9%. In 2015, approximately 1 in every 37,180 girls born was named Tierney. FALLING Recent data shows the name is currently falling.