Tierney is a distinctive girls' name in United States, ranking #2539 in 2007 with 74 recorded births. The name reached its all-time peak in 2000 with 110 births ranking #1616. Since 1996, the popularity has decreased by 27.5%. In 2007, approximately 1 in every 25,979 girls born was named Tierney. FALLING Recent data shows the name is currently falling.