National Register of Historic Places listings in Monona County, Iowa
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Monona County, Iowa, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in a map.
There are 10 properties and districts listed on the National Register in the county, including one National Historic Landmark.
|||Name on the Register||Image||Date listed||Location||City or town||Description|
|1||Garretson Outlet Bridge||
|County Road K64 over Garretson Outlet Ditch
|2||Ingemann Danish Evangelical Lutheran Church and Cemetery||
|32044 County Road E54
|3||Jones Creek Watershed Historic District||
|Between the Little Sioux and Soldier Rivers, southwest of Moorhead
|4||Mann School No. 2||
|Oak Ave, 3.5 miles northwest of the entrance to Preparation Canyon State Park
|5||Monona County Courthouse||
|6||Onawa IOOF Opera House||
|1023 10th Ave.
|7||Onawa Public Library||
|Iowa Ave. and 7th St.
|8||Round Barn, Cooper Township||
|Iowa Highway 141
|9||Trinity Memorial Episcopal Church||
|302 S. 7th St.
|10||Newell A. Whiting House||
|1106 Iowa Ave.
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- The latitude and longitude information provided in this table was derived originally from the National Register Information System, which has been found to be fairly accurate for about 99% of listings. For about 1% of NRIS original coordinates, experience has shown that one or both coordinates are typos or otherwise extremely far off; some corrections may have been made. A more subtle problem causes many locations to be off by up to 150 yards, depending on location in the country: most NRIS coordinates were derived from tracing out latitude and longitudes off of USGS topographical quadrant maps created under the North American Datum of 1927, which differs from the current, highly accurate WGS84 GPS system used by most on-line maps. Chicago is about right, but NRIS longitudes in Washington are higher by about 4.5 seconds, and are lower by about 2.0 seconds in Maine. Latitudes differ by about 1.0 second in Florida. Some locations in this table may have been corrected to current GPS standards.
- "National Register of Historic Places: Weekly List Actions". National Park Service, United States Department of the Interior. Retrieved on July 14, 2017.
- Numbers represent an ordering by significant words. Various colorings, defined here, differentiate National Historic Landmarks and historic districts from other NRHP buildings, structures, sites or objects.
- National Park Service (2008-04-24). "National Register Information System". National Register of Historic Places. National Park Service.
- The eight-digit number below each date is the number assigned to each location in the National Register Information System database, which can be viewed by clicking the number.