Tierney is a distinctive girls' name in United States, ranking #2937 in 2010 with 59 recorded births. The name reached its all-time peak in 2000 with 110 births ranking #1616. Since 1996, the popularity has decreased by 42.2%. In 2010, approximately 1 in every 30,124 girls born was named Tierney. FALLING Recent data shows the name is currently falling.