Allen is a distinctive boys' name in England & Wales, ranking #3256 in 2025 with 6 recorded births. The name reached its all-time peak in 2007 with 22 births ranking #1079. Since 1996, the popularity has decreased by 40.0%. In 2025, approximately 1 in every 45,323 boys born was named Allen. FALLING Recent data shows the name is currently falling.