Mercer is a distinctive girls' name in United States, ranking #7537 in 2014 with 16 recorded births. This places Mercer in the top 39% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2016 with 17 births ranking #7120. In 2014, approximately 1 in every 111,621 girls born was named Mercer. FALLING Recent data shows the name is currently falling.