Gareth is a distinctive boys' name in United States, ranking #1582 in 2015 with 102 recorded births. The name reached its all-time peak in 2016 with 104 births ranking #1580. Since 1996, the popularity has increased by 32.5%. In 2015, approximately 1 in every 18,787 boys born was named Gareth. STABLE Recent data shows the name is currently stable.