Tierney is a distinctive girls' name in United States, ranking #2326 in 2006 with 82 recorded births. The name reached its all-time peak in 2000 with 110 births ranking #1616. Since 1996, the popularity has decreased by 19.6%. In 2006, approximately 1 in every 23,184 girls born was named Tierney. FALLING Recent data shows the name is currently falling.