In 2025, 5 US boys were named Delmer, making it the 12,484th most common boys’ name of the year. Its best rank for boys was #405, reached in 1935. The most boys given the name in a single year was 205, in 1924. For comparison, it was #11,005 in 2015 and #763 in 1950.
Social Security card records list Delmer in 127 years of the 146 from 1880 to 2025, starting in 1883 with 7 babies. In all, 7,670 US babies have been given the name, 0.2% of them girls and 99.7% boys. Its busiest decade was the 1920s, with 1,911 babies named Delmer.
Over the 10 years from 2016 to 2025, 42 US boys were named Delmer; the busiest of those years was 2023, with 10. In 2025 that was about 1 in 341,615 of the boys in SSA’s list for the year.
Related spellings in the SSA files include Elmer (131,344 babies since 1880), Del (4,970 babies since 1880) and Delmar (14,376 babies since 1880).