Dalen is a distinctive boys' name in United States, ranking #2260 in 2009 with 58 recorded births. The name reached its all-time peak in 2001 with 99 births ranking #1316. Since 1996, the popularity has increased by 38.1%. In 2009, approximately 1 in every 34,195 boys born was named Dalen. FALLING Recent data shows the name is currently falling.