Macarthur is a distinctive boys' name in United States, ranking #6647 in 2019 with 13 recorded births. The name reached its all-time peak in 1997 with 18 births ranking #3826. Since 1996, the popularity has increased by 18.2%. In 2019, approximately 1 in every 137,951 boys born was named Macarthur. FALLING Recent data shows the name is currently falling.