Darby is a distinctive boys' name in United States, ranking #2632 in 2001 with 36 recorded births. This places Darby in the top 21% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2003 with 46 births ranking #2319. In 2001, approximately 1 in every 53,968 boys born was named Darby. FALLING Recent data shows the name is currently falling.