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Male, US, born 1918-06-10, died 1983-03-22

Associated with the firms network

Branch, B.H., Architect; Mithun Bowman Emrich Group, Architects; Mithun Partners, Architects + Designers + Planners; Mithun and Associates, Architects; Mithun and Nesland, Architects; Mithun and Nesland, Ridenour and Cochrane, Architects; Mithun | Hodgetts + Fung; Mithun, Ridenour and Cochran, Architects; Naramore, Bain, Brady, and Johanson, (NBBJ); Wilson-Mithun Partners, Architects

Professional History


Mithun enlisted in the US Navy during World War II, on 09/05/1942, serving until 06/03/1946. (See, Source Information, U.S., Department of Veterans Affairs BIRLS Death File, 1850-2010 [database on-line]. Provo, UT, USA: Operations, Inc., 2011, accessed 10/01/2018.) Another miltary document listed a "date of precedence" in the US Naval Reserve of 08/17/1942. His rank was Ensign.

Architect, U.S. Navy, Bremerton Shipyards, Bremerton, WA, 1945-1946.

Draftsman, B.H. Branch, Architect, Bremerton, WA, c. 1946; Mithun, having a background in naval architecture, supervised ship construction and repair during World War II.

Draftsman, Naramore, Brady, Bain and Johanson (NBBJ), Architects, Seattle, WA, 1946-1947.

Partner, Wilson-Mithun Partners, Architects, Bellevue, WA, 1949-1952.

Partner, Mithun and Nesland, Architects, Bellevue, WA, 1952-1955;

Partner, Mithun and Associates, Bellevue, WA, 1955-1958.

Partner, Mithun, Ridenour and Cochran, Architects, Bellevue, WA, 1958-1960;

Partner, Mithun and Associates, Bellevue, WA, 1960-1984. the firm was known as "The Mithun Associates" from c. 1975 until 1983, according to former AIA Seattle Director, Marga Rose Hancock.

Mithun's firm changed names several times after Omer Mithun's death in 1983; it was known as "Mithun Bowman Emrich Group," "Mithun Partners," and finally just "Mithun." It moved from its long-time home in Bellevue to Seattle, WA, in 1990.

In 2010, Mithun Architects + Designers + Planners, maintained offices in Seattle, WA, and San Francisco, CA.


Assistant Professor, University of Washington (UW), Department of Architecture, Seattle, WA, 1947-1950.

Associate Professor, UW, Department of Architecture, Seattle, WA, 1950-1982.

Professor, UW, Department of Architecture, Seattle, WA, 1982-1983.

Professional Activities

Member/Chair, Bellevue Planning Commission, Bellevue, WA, 1953-72.

Member, City of Medina Planning Commission, Medina, WA.

Mithun took the Oath of Office for the State of Washington Architect's Registration office in 1968 and 1973.

Professional Awards

Fellow, American Institute of Architects (FAIA), 04/1973. Mithun and fellow faculty member at the University of Washington's College of Architecture and Urban Planning, Phillip Jacobson (b. 1928), were elected to FAIA status at this time. (See "Two Named F.A.I.A. fellows," Seattle Times, 04/22/1973, p. 51.)



B.Arch., University of Minnesota, Minneapolis-Saint Paul, MN, 1942.

Graduate degree in naval architecture, University of Michigan (U of M), Ann Arbor, 1945.



Mithun was born in Marcus, IA, on 06/10/1918. In 1920, his parents Sigurd and Lily continued to reside in Marcus, where he worked as a bank bookeeper. The 1920 US Census mistakenly noted that Sigurd had immigrated from Denmark, not Norway. (See, Source Citation Year: 1920; Census Place: Marcus, Cherokee, Iowa; Roll: T625_482; Page: 11A; Enumeration District: 26, accessed 02/14/2024.) The 1925 IA State Census also found the Mithuns living in Marcus, living in a $25-a-month rented dwelling. (See, Source Citation State Historical Society of Iowa (via Heritage Quest); Microfilm of Iowa State Censuses, 1856, 1885, 1895, 1905, 1915, 1925 as well various special censuses from 1836-1897, accessed 02/14/2024.)

In 1930, the Mithun Family resided in a rental residence in the Bamer Addition of Marcus, IA. (Rent was $25 per month.) At this time, the household included a cousin, Myrtle Gendron (born c. 1915 in ND). (See, Source Citation Year: 1930; Census Place: Marcus, Cherokee, Iowa; Page: 11B; Enumeration District: 0013; FHL microfilm: 2340382, accessed 10/01/2018.)

They moved to Clinton Township, MN, in 1940, living in $15-per-month rental acccommodations. On 10/16/1940, Mithun was a student at the University of Minnesota in Minneapolis. He listed his permanent address with his parents in Steen, MN, a small town in the southwest corner of the state near the IA border. Steen was located within the boundaries of Clinton Township. (See, Source Citation National Archives at St. Louis; St. Louis, Missouri; Wwii Draft Registration Cards For Minnesota, 10/16/1940-03/31/1947; Record Group: Records of the Selective Service System, 147; Box: 157, accessed 02/14/2024.)

While he was in the US Navy, he and Ruth spent a part of 1945 in Holland, MI. They had a house at 91 West 18th Street. (See Holland, Michigan, City Directory, 1945, p. 155.)

In 1948, he and his wife lived at 5116 Brighton Street in Seattle, WA. (See Seattle, Washington, City Directory, 1948, p. 940.)


Sigurd O. Mithun (born 07/16/1882in Norway-d. 09/26/1975 in Ramsey County, MN), Omer's father, worked as a bookkeeper for a ban in 1920 and an auditor for a bank and lumber yard in 1930. (He managed a lumber yard in Clinton, MN, in 1940.) According to the US Census of 1930, he immigrated to the US from Norway in 1903, although US Customs documents indicated that he arrived aboard the S.S. Oceanic from Liverpool, England, on 08/20/1903. This document recorded that he and Louis Martin Mithun (born c. 1875 in Norway) arrived in the US from Bergen, Norway. (See, Source Citation, Year: 1903; Arrival: New York, New York; Microfilm Serial: T715, 1897-1957; Microfilm Roll: Roll 0385; Line: 18; Page Number: 49 accessed 10/01/2018.)

Sigurd married Omer's mother Lillian May Button (born 04/18/1894 in ND-d. 04/16/1980 in Saint Paul, MN) on 05/29/1916 in Fargo, ND. Lillian managed the household.

She and Sigurd had three children, Omer, James Oliver Mithun (born 04/23/1927 in Marcus, IA-d. 03/23/1966 in Marin County, CA), and Rosemary June Mithun Gustafson, (born 10/02/1928 in Marcus, IA-d. 11/17/2014 in North Saint Paul, MN). Both James and Rosemary attended the University of MN, like Omer.


He married Ruth Eleonore Trueblood (born 03/24/1919-d. 04/13/2009 in King County, WA) on 04/23/1943 in Washington, DC. (See, Source Information District of Columbia, U.S., Marriage Records, 1810-1953 [database on-line]. Lehi, UT, USA: Operations, Inc., 2016, accessed 02/14/2024.)

After Omer's death, she married Donald Klopfer on 07/10/1987 in KIng County, WA.

Biographical Notes

Mithun's World War II draft registration card of 10/16/1940 listed him as standing 5-feet, 11-inches tall and weighing 170 pounds. He was listed as being Caucasian with a light complexion, blue eyes and brown hair.

SSN: 473-20-0943.

Associated Locations

  • Marcus, IA (Architect's Birth)
    Marcus, IA

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  • Bellevue, WA (Architect's Death)
    Bellevue, WA

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PCAD id: 2372

4406 140th Avenue SE House, Bellevue, WABellevueWA
Bellevue Medical and Dental Center, Bellevue, WA1962BellevueWA
Bellevue Presbyterian Church, Bellevue, WA1955BellevueWA
Benson Glenn Tract Housing, Renton, WARentonWA
City of Bellevue, Fire Department, Station #1, Bellevue, WA1976BellevueWA
City of Puyallup, City Hall, Puyallup, WA2006-2008PuyallupWA
Equinox Condominiums, Eastlake, Seattle, WASeattleWA
Everwood Office Park, Office Buildings, Bellevue, WA1976BellevueWA
Everwood Park Office Buildings, Bellevue, WA1976BellevueWA
Fairview Avenue and Mercer Street Condominiums, South Lake Union, Seattle, WASeattleWA
Grace Lutheran Church, Bellevue, WA1963-1964BellevueWA
Heartline Apartments and Office Building, Pearl District, Portland, OR2018PortlandOR
Kempton Downs Housing Development, Bellevue, WABellevueWA
Lurie House, Bellevue, WA1952BellevueWA
Oregon Tile and Marble, Showroom, Seattle, WA1987SeattleWA
Perot Family Offices, Turtle Creek, Dallas, TX2017DallasTX
Port Gardner Wharf, Everett, WAEverettWA
Puget Sound Environmental Learning Center, Bainbridge Island, WABainbridge IslandWA
Radford Court, Seattle, WASeattleWA
Recreational Equipment Incorporated (REI), Approach Concept Store, Bellevue, WABellevueWA
Recreational Equipment Incorporated (REI), Flagship Store #3, Seattle, WASeattleWA
Reed, John Porter and Janet Marian, House, Bellevue, WA1955-1956BellevueWA
Seattle Trust and Savings Bank, Office Building, Downtown, Bellevue, WA1972BellevueWA
Smith, Lyman Cornelius, Tower, Pioneer Square, Seattle, WA1912-1914SeattleWA
Surrey Downs Residential Sub-Division, Bellevue, WA1952-1954BellevueWA
Tally Building, Bellevue, WA1976BellevueWA
The Meadows Residential Tract, Redmond, WA1975RedmondWA
Unico Properties Inhabit Model Apartments, Downtown, Seattle, WASeattleWA
University Prep, ULAB, Ravenna, Seattle, WA2022-2023
University of Washington, Seattle (UW), Lander, Edward, Hall #3, Seattle, WA2012-2014SeattleWA
University of Washington, Seattle (UW), Maple Hall, Seattle, WA2014SeattleWA
University of Washington, Seattle (UW), Nordheim Court, Seattle, WASeattleWA
University of Washington, Seattle (UW), Student Housing, Phase 1, Site 33, Seattle, WA2010SeattleWA
Washington Aircraft and Transportation Corporation. Office Building and Hangar1958
Washington Children's Home, Seattle, WA1973SeattleWA
Washington Children's Home, Seattle, WA1973SeattleWA
Washington Mutual Savings Bank, Main Office #2, 1101 2nd Avenue, Downtown, Seattle, WA1968-1969SeattleWA
Washington State Bank, Bellevue, WA1957BellevueWA
Washington State Bank, Branch, Bellevue, WA1955BellevueWA
Wenberg, Johan and Louise Bruse, House, Overdale Park, Issaquah, WA1963IssaquahWA