Irwin is a distinctive boys' name in United States, ranking #2750 in 2003 with 36 recorded births. The name reached its all-time peak in 2007 with 47 births ranking #2620. Since 1996, the popularity has decreased by 12.2%. In 2003, approximately 1 in every 54,869 boys born was named Irwin. RISING Recent data shows the name is currently rising.