Marco has been given to about 76,917 people in the United States since 1880. It was most common in 2005, which makes it a millennial-parent name.
Marco ranks 370th among American boys in 2025, with 862 born that year. Its best year was 2005, when 2,117 babies were given the name, ranking 187th. The typical living American called Marco is about 27 years old today. It is relatively most common in Arizona, where it accounts for 0.05% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.