In 2025, 52 US boys were named Marius, making it the 2,555th most common boys’ name of the year, down 120 places from #2,435 in 2024. That is 5 fewer than the 57 boys named Marius in 2024. Its best rank for boys was #964, reached in 1881. The most boys given the name in a single year was 80, in 2004. For comparison, it was #2,220 in 2015 and #2,165 in 1950.
Social Security card records list Marius in 105 years of the 146 from 1880 to 2025, starting in 1881 with 5 babies. In all, 2,654 US babies have been given the name, all of them boys. Its busiest decade was the 2010s, with 613 babies named Marius.
Over the 10 years from 2016 to 2025, 576 US boys were named Marius; the busiest of those years was 2016, with 68. In 2025 that was about 1 in 32,848 of the boys in SSA’s list for the year.
Among the states, Marius ranked highest in Virginia in 2025, at #1,198 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Mario (152,403 babies since 1880) and Maris (2,903 babies since 1880).