Dalen is a distinctive boys' name in United States, ranking #2049 in 1996 with 42 recorded births. This places Dalen in the top 19% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2001 with 99 births ranking #1316. In 1996, approximately 1 in every 45,101 boys born was named Dalen. FALLING Recent data shows the name is currently falling.