In 2025, 64 US boys were named Sylvester, making it the 2,224th most common boys’ name of the year, down 110 places from #2,114 in 2024. That is 7 fewer than the 71 boys named Sylvester in 2024. Its best rank for boys was #127, reached in 1889. The most boys given the name in a single year was 807, in 1920. For comparison, it was #1,999 in 2015 and #256 in 1950.
Social Security card records list Sylvester in every one of the 146 years from 1880 to 2025; in 1880 there were 89 babies with the name. In all, 43,857 US babies have been given the name, 1.4% of them girls and 99% boys. Its busiest decade was the 1920s, with 7,028 babies named Sylvester.
Over the 10 years from 2016 to 2025, 667 US boys were named Sylvester; the busiest of those years was 2019, with 74. In 2025 that was about 1 in 26,689 of the boys in SSA’s list for the year.
Among the states, Sylvester ranked highest in Pennsylvania in 2025, at #1,415 for boys there. It was not in the top 100 of any state. Rarer spellings such as Silvester, Sylvestre and Silvestro are summarised on this page. The open nickname list we use links it to Si, Sly, Sy, Syl, Vessie and Vester.