Explore the Family Name Detlefsen
The meaning of Detlefsen
Danish, North German, and North Frisian: patronymic from the personal name Detlef (see Dethlefs). Some characteristic forenames: German Guenther, Hans, Kurt.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Detlefsen in the United States?
The Detlefsen surname has seen a slight increase in popularity between the years 2000 to 2010, according to data from the Decennial U.S. Census. In 2000, it was ranked 37,788 in popularity, but by 2010, it climbed up slightly to 37,229. The count of individuals with this last name also increased during this period, from 553 to 599, an 8.32% change. However, its proportion per 100k people remained consistent at 0.2.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #37,788 | #37,229 | 1.48% |
| Count | 553 | 599 | 8.32% |
| Proportion per 100k | 0.2 | 0.2 | 0% |
Race and Ethnicity of people with the last name Detlefsen
The ethnic identity associated with the Detlefsen surname underwent subtle changes from 2000 to 2010, based on information gathered from the Decennial U.S. Census. In 2000, 97.11% of those with the surname identified as White, but that number dipped to 93.82% by 2010. There was a small emergence of Hispanic identification within this surname group, going from 0% in 2000 to 3.51% in 2010. Slightly more people reported having two or more ethnic identities, increasing from 0.90% to 1.50%. Although the percentage of those identifying as Asian/Pacific Islander was negligible, there was a small change from 2000 to 2010. No one under this surname reported identifying as Black or American Indian and Alaskan Native for both years.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 97.11% | 93.82% | -3.39% |
| Hispanic | 0% | 3.51% | 0% |
| Two or More Races | 0.9% | 1.5% | 66.67% |
| Asian/Pacific Islander | 0% | 0.83% | 0% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |