Dalen is a distinctive boys' name in United States, ranking #1508 in 1999 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 1999, approximately 1 in every 25,601 boys born was named Dalen. FALLING Recent data shows the name is currently falling.