Dalen is a distinctive boys' name in United States, ranking #1901 in 2010 with 75 recorded births. The name reached its all-time peak in 2001 with 99 births ranking #1316. Since 1996, the popularity has increased by 78.6%. In 2010, approximately 1 in every 25,579 boys born was named Dalen. FALLING Recent data shows the name is currently falling.