Emmet County Iowa has 4 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Ellsworth Ranch Bridge and Thomsen Round Barn, Brugjeld--Peterson Family Farmstead District.
Some of the country's most noteable architects helped create the Emmet County places including King Bridge Co., Peder N. Peterson and Peder N. Brugjeld. Prominent architectural styles found in Emmet Country are .