Fewer than five US boys were named Nickolaus in 2025, so it does not appear in that year’s SSA list for boys. Its best rank for boys was #1,163, reached in 1982. The most boys given the name in a single year was 72, in 1993. For comparison, it was #6,967 in 2015 and unranked in 1950.
Social Security card records list Nickolaus in 51 years of the 146 from 1880 to 2025, starting in 1921 with 5 babies. In all, 1,795 US babies have been given the name, all of them boys. Its busiest decade was the 1990s, with 609 babies named Nickolaus.
Over the 10 years from 2016 to 2025, 26 US boys were named Nickolaus; the busiest of those years was 2017, with 11.
Related spellings in the SSA files include Nickolas (39,403 babies since 1880), Nicholaus (3,260 babies since 1880), Nicolas (101,764 babies since 1880) and Nikolas (24,050 babies since 1880). Rarer spellings such as Nickalous and Nickelous are summarised on this page.