In 2025, 579 US boys were named Marcos, making it the 517th most common boys’ name of the year, down 36 places from #481 in 2024. That is 64 fewer than the 643 boys named Marcos in 2024. Its best rank for boys was #224, reached in 1996. The most boys given the name in a single year was 1,415, in 2001. For comparison, it was #408 in 2015 and #709 in 1950.
Social Security card records list Marcos in 121 years of the 146 from 1880 to 2025, starting in 1888 with 5 babies. In all, 53,742 US babies have been given the name, 0.3% of them girls and 99.6% boys. Its busiest decade was the 2000s, with 13,604 babies named Marcos.
Over the 10 years from 2016 to 2025, 6,522 US boys were named Marcos; the busiest of those years was 2017, with 732. In 2025 that was about 1 in 2,950 of the boys in SSA’s list for the year.
Among the states, Marcos ranked highest in California in 2025, at #309 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Mark (1,366,672 babies since 1880), Marcus (242,999 babies since 1880), Marc (141,137 babies since 1880) and Marco (76,917 babies since 1880).