Macarthur is a distinctive boys' name in United States, ranking #5376 in 2020 with 17 recorded births. The name reached its all-time peak in 1997 with 18 births ranking #3826. Since 1996, the popularity has increased by 54.5%. In 2020, approximately 1 in every 101,474 boys born was named Macarthur. FALLING Recent data shows the name is currently falling.