Oscar Lunseth was born August 14, 1894, in Grand Forks, North Dakota. He was the son of John and Caroline (Olsen) Lunseth. His father came to Grand Forks in 1887, and served as the City Superintendent of Water Works. Oscar Lunseth attended public schools in Grand Forks.
Lunseth joined the United States Navy during World War I, enlisting at Grand Forks on December 10, 1917. He served at the Great Lakes Naval Training Station in Illinois until his discharge on May 6, 1919. During his time in the Navy, he served as a Fireman Third Class, Plumber and Fitter, Water Tender and Chief Water Tender.
Following the war, Lunseth returned to Grand Forks and a position with Dakota Plumbing and Heating. He first began working for this company in 1912. He worked for Dakota Plumbing and Heating for over twenty-three years, leaving in 1935.
In July of that year, Lunseth his brother Rasmus founded Lunseth Plumbing and Heating. Located at 135 South Third Street, the firm specialized in "boilers-stokers-oil burners-air conditioners-water softeners-farm water systems." Oscar Lunseth served as vice president and secretary of the company until his death in 1976.
Lunseth was active in Grand Forks city government, serving as City Alderman from 1940-1952, and mayor from 1952-1960. On a statewide level, he was especially concerned about the issue of water conservation. He was a member of the North Dakota State Water Conservation Commission from 1951-1965, and served as director of the Missouri-Souris River Water Project Association. He also served on the Red River Planning Committee and the North Dakota Reclamation Association. He was honored by the Sertoma Club in 1975 with the "Service to Mankind Award." He was chosen for the award due to "his pioneering work in the field of water conservation and purity." He was a member of the American Legion, the Sons of Norway, the Elks and United Lutheran Church. He was active in the North Dakota State Association of Master Plumbers, serving as both President and Secretary.
He married Sophia Bergetta Bentley on December 31, 1921, in Twin Valley, Minnesota. The couple had three children: John, Lois and Louanna.
Oscar Lunseth died on February 23, 1976, in Grand Forks.
Series 1: Water Materials
Series 2: Grand Forks City Material
Series 3: Personal Material
Series 4: Newspapers and Miscellaneous
Series 5: Photographs