In 2025, 15 US boys were named Dalen, making it the 5,910th most common boys’ name of the year, down 428 places from #5,482 in 2024. That is 2 fewer than the 17 boys named Dalen in 2024. Its best rank for boys was #1,316, reached in 2001. That year also had the most boys given the name: 99. For comparison, it was #3,530 in 2015 and unranked in 1950.
Social Security card records list Dalen in 75 years of the 146 from 1880 to 2025, starting in 1941 with 5 babies. In all, 1,987 US babies have been given the name, 0.8% of them girls and 99% boys. Its busiest decade was the 2000s, with 737 babies named Dalen.
Over the 10 years from 2016 to 2025, 238 US boys were named Dalen; the busiest of those years was 2016, with 33. In 2025 that was about 1 in 113,872 of the boys in SSA’s list for the year.
Related spellings in the SSA files include Dallin (5,197 babies since 1880), Daylen (4,330 babies since 1880), Daylin (3,824 babies since 1880) and Daylon (3,294 babies since 1880).