Allen is a distinctive boys' name in England & Wales, ranking #3990 in 2021 with 4 recorded births. This places Allen in the bottom 36% of ranked UK boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 22 births ranking #1079. Since 1996, the popularity has decreased by 60.0%. In 2021, approximately 1 in every 73,747 boys born was named Allen. FALLING Recent data shows the name is currently falling.