In 2025, 63 US boys were named Kassius, making it the 2,243rd most common boys’ name of the year, down 346 places from #1,897 in 2024. That is 21 fewer than the 84 boys named Kassius in 2024. Its best rank for boys was #1,463, reached in 2022. That year also had the most boys given the name: 124. For comparison, it was #2,740 in 2015 and unranked in 1950.
Social Security card records list Kassius in 23 years of the 146 from 1880 to 2025, starting in 2001 with 5 babies. In all, 1,197 US babies have been given the name, 0.8% of them girls and 99% boys. Its busiest decade was the 2020s, with 602 babies named Kassius.
Over the 10 years from 2016 to 2025, 939 US boys were named Kassius; the busiest of those years was 2022, with 124. In 2025 that was about 1 in 27,112 of the boys in SSA’s list for the year.
Among the states, Kassius ranked highest in Florida in 2025, at #1,970 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Cassius (9,766 babies since 1880).