National Register of Historic Places listings in Mercer County, Illinois
This is a list of the National Register of Historic Places listings in Mercer County, Illinois.
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Mercer County, Illinois, 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 11 properties and districts listed on the National Register in the county. Another property was once listed but has been removed.
|||Name on the Register||Image||Date listed||Location||City or town||Description|
|5th and Main St.
|2||Downtown Aledo Historic District||
|100-200 blks. N. College, 100, 200, 300 blks. S. College, 100 blk. NW. 2nd, 200 blk. SW. 2nd Aves.
|3||Gideon Ives House||
|408 E. Jefferson St.
|4||Keithsburg Historic District||
|Roughly bounded by Jackson, 5th, Washington, and 3rd Sts.
|5||Lock and Dam No. 17 Historic District||
|173 Lock and Dam Rd.
|6||Mercer County Courthouse||
|SE 3rd St. (IL 17)
|7||Mercer County Fairgrounds||
|12th Ave., SW., .5 mi. S of jct. with IL 17
|8||Mercer County Jail||
|309 S. College Ave.
|9||Sherrard Banking Company||
|314 Third St.
|10||James S. Thompson House||
|804 North St.
|11||Levi Willits House||
|202 Main St.
|||Name on the Register||Image||Date listed||Date removed||Location||City or town||Summary|
|1||United Presbyterian Church||
||Main and 8th Sts.
- 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 August 19, 2016.
- 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.
- 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.
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