Over the past 110 years, 12 girls and 47 351 boys have been named Marcos. The name Marcos ranks 14838th in the United States among the most common names for girls. For the first time more than ten times newborns were named Marcos in 1979. The peak of popularity of the name Marcos came in the 1970s and 1990s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.