Tierney is a distinctive girls' name in United States, ranking #1871 in 2001 with 94 recorded births. This places Tierney in the top 10% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2000 with 110 births ranking #1616. In 2001, approximately 1 in every 19,155 girls born was named Tierney. FALLING Recent data shows the name is currently falling.