Greene County Iowa (Historic Districts) has 7 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Squirrel Hollow County Park Historic District, Lincoln Highway--Buttrick's Creek to Grand Junction Segment, Lincoln Highway--Grand Junction Segment, Lincoln Highway--Raccoon River Rural Segment and Lincoln Highway--West Beaver Creek Abandoned Segment.
Some of the country's most noteable architects helped create the Greene County places including CWA,PWA,and WPA labor, Iowa State Col Central Design Office, Iowa Highway Commission, Greene County, Empire Construction Co. and Iowa Bridge Co.. Prominent architectural styles found in Greene Country are Late Victorian and Modern Movement.