Tierney is a distinctive girls' name in United States, ranking #3331 in 2020 with 47 recorded births. The name reached its all-time peak in 2000 with 110 births ranking #1616. Since 1996, the popularity has decreased by 53.9%. In 2020, approximately 1 in every 34,373 girls born was named Tierney. FALLING Recent data shows the name is currently falling.