Dorthea Dahl (March 20, 1881 – September 11, 1958) was a Norwegian-born American writer. Dahl has been recognized for her great contributions to Norwegian-American literature. She wrote numerous short stories for magazines, wrote and published collections of short stories and a novel.
Dahl was born at the parish of Osen in Sør-Trøndelag, Norway. She was the daughter of Peder Person Dahl (1846-1925) and Lene Martinusdatter Ulvevadet Dahl (1839-1918). She came to America during 1883 at the age of two along with her parents and six older siblings. Her family initially lived in a homestead in Day County, South Dakota. In 1900, Dahl began at the State Normal School in Madison, Wisconsin, but the signs of tuberculosis prevented a future as a teacher. She briefly attended St. Olaf College but starting during 1903 would spend her adult life in Kootenai County, near Coeur d'Alene, Idaho. She worked as an accountant for a grain firm, in various trading companies and insurance companies.
Poor health thwarted her hopes of becoming a missionary, but she found consolation in taking part in temperance movement work. Religious by nature, Dahl was active within Lutheran Church organizations, including Daughters of the Reformation and the Rocky Mountain Women's Missionary Federation.
Dorthea Dahl was equally competent in both the Norwegian and English languages. She began writing her many stories of small-town and farm immigrant life exclusively in Norwegian, publishing in a variety of periodicals. Dahl wrote several books and a number of short stories published in the Norwegian-American press, most notably in the The Friend, published in Minneapolis by Nils Nilsen Ronning. Between 1917 and 1935, Dahl worked as a staff writer for two Norwegian language publications, the Christmas annual Jul i Vesterheimen and the Norwegian Lutheran Church publication Lutheraneren. 
She published two collections of short stories. The first, Fra Hverdagslivet, was written in Norwegian and translated as From Everyday Life. For her second, Returning Home, she wrote in English. Byen paa Berget, her first novel was published in 1925 and was written in Norwegian. That book was later translated as The City Upon A Hill. Dahl continued to write short stories for the rest of her life. Woven into Dahl's immigrant theme is always the conflict between service to others and pursuit of personal success. Dahl showed a pragmatic attitude to the many questions of Norwegian American assimilation and she was an early advocate of the use of English as a church language.
She was honored by the Norwegian Society in America (Det Norske Selskab i Amerika) with its annual literary prize in 1918. She was a representative from the State of Idaho at the Norse-American Centennial in Minneapolis in June 1925.
- Fra Hverdagslivet (Augsburg Publishing. Minneapolis, MN. 1915)
- Returning Home (Augsburg Publishing. Minneapolis, MN. 1920)
- Byen paa Berget ( Augsburg Publishing. Minneapolis, MN. 1925)
- The Scandinavian Immigrant Writer in America (Dorothy Burton Skardal. (Norwegian-American Historical Association. Volume 21: Page 14)
- "Norwegian immigrant in Moscow became prominent Idaho author". Moscow-Pullman Daily News. January 30, 2016. Retrieved March 1, 2016.
- The Multilingual anthology of American literature : a reader of original texts with English translations (Marc Shell; Werner Sollors. New York University Press, 2000)
- Souvenir: Norse-American Women 1825-1925 (edited by Alma A. Guttersen and Regina Helleboe Christensen. St. Paul, MN: Lutheran Free Church Publishing Company, 1926 pp. 330-332)
- Kristin A. Risley (2003). "Christmas in Our Western Home: The Cultural Work of a Norwegian-American Christmas Annual". American Periodicals: A Journal of History & Criticism Volume 13, 2003 Moscow-Pullman Daily News. Retrieved March 1, 2016.
- Aagot D. Hoidahl. "Norwegian-American Fiction, 1880-1928". The Norwegian-American Historical Association (Volume V: Page 61). Retrieved March 1, 2016.
- Vikings Of The Midwest: Place, Culture, And Ethnicity In Norwegian-American Literature, 1870-1940 (Kristin Ann Risley, Doctor of Philosophy Dissertation. Ohio State University. 2003)
- Dorthea Dahl (Hilde Petra Brungot. Store norske leksikon)
- Brungot, Hilde Petra (1977) Dorthea Dahl: Norwegian American Author of Everyday Experience (University of Oslo thesis, Norwegian American Historic Association)
- Øverland, Orm (1996) The Western Home: A Literary History of Norwegian America (Norwegian American Historical Association. University of Illinois Press. Chapter 19)