In 2025, 276 US boys were named Carlo, making it the 869th most common boys’ name of the year, up 47 places from #916 in 2024. That is 22 more than the 254 boys named Carlo in 2024. Its best rank for boys was #470, reached in 1923. The most boys given the name in a single year was 276, in 2025. For comparison, it was #1,256 in 2015 and #800 in 1950.
Social Security card records list Carlo in 125 years of the 146 from 1880 to 2025, starting in 1894 with 5 babies. In all, 16,000 US babies have been given the name, 0.5% of them girls and 99.5% boys. Its busiest decade was the 1970s, with 2,015 babies named Carlo.
Over the 10 years from 2016 to 2025, 1,835 US boys were named Carlo; the busiest of those years was 2025, with 276. In 2025 that was about 1 in 6,189 of the boys in SSA’s list for the year.
Among the states, Carlo ranked highest in California in 2025, at #531 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Charles (2,447,135 babies since 1880), Carl (508,017 babies since 1880), Carlos (309,076 babies since 1880) and Karl (101,751 babies since 1880).