In 2025, 6 US boys were named Kiefer, making it the 11,399th most common boys’ name of the year, up 1,956 places from #13,355 in 2024. That is 1 more than the 5 boys named Kiefer in 2024. Its best rank for boys was #710, reached in 1991. That year also had the most boys given the name: 204. For comparison, it was #4,034 in 2015 and unranked in 1950.
Social Security card records list Kiefer in 37 years of the 146 from 1880 to 2025, starting in 1988 with 35 babies. In all, 1,950 US babies have been given the name, all of them boys. Its busiest decade was the 1990s, with 969 babies named Kiefer.
Over the 10 years from 2016 to 2025, 97 US boys were named Kiefer; the busiest of those years was 2016, with 21. In 2025 that was about 1 in 284,679 of the boys in SSA’s list for the year.
Related spellings in the SSA files include Keifer (1,155 babies since 1880). Rarer spellings such as Keefer, Kieffer and Keiffer are summarised on this page.