Platte County Wyoming (Historic Districts) has 6 places on the National Register of Historic Places including 1 place of National significance and 3 places of Statewide significance. Significant places include Lake Guernsey State Park, Diamond Ranch, Guernsey Lake Park and Sunrise Mine Historic District and Diamond Ranch.
Some of the country's most noteable architects helped create the Platte County places including Redell, Richard G., et al., S. R. Deboer, Civilian Conservation Corps, George D. Rainsford, Roland Pray and Robert Grant. Prominent architectural styles found in Platte Country are Bungalow/Craftsman.