The Jack Lamberson House, also known as the "Maunu house", is a historic residence located in Oskaloosa, Iowa, United States. It is one of seven Frank Lloyd Wright-designed Usonian houses located in Iowa, and one of two that were constructed in Oskaloosa. Both were completed in 1951. The Lamberson house is unique from the other Iowa Usonians for its extensive use of 60ft and 120ft angles. It features a low, sweeping pitched roof that makes the house look deceptively large, yet it is the second smallest of Iowa's Usonians. It was listed on the National Register of Historic Places in 1988.
