Irwin is a distinctive boys' name in United States, ranking #5175 in 2009 with 18 recorded births. The name reached its all-time peak in 2007 with 47 births ranking #2620. Since 1996, the popularity has decreased by 56.1%. In 2009, approximately 1 in every 110,184 boys born was named Irwin. RISING Recent data shows the name is currently rising.