Illinois - Mercer County
Mercer County Illinois has 12 places on the National Register of Historic Places including 1 place of National significance. Significant places include Lock and Dam No. 17 Historic District, Commercial House, Ives, Gideon, House, Keithsburg Historic District and Mercer County Courthouse.

Some of the country's most noteable architects helped create the Mercer County places including U.S. Army Corps of Engineers, Harney Brothers, M.E. Bell, Clair F. Drury, J.S. Pinkerton, Leach,L.L., & Sons, Thompson & Partridge, Sharp, J.L., and Son and Levi Willits. Prominent architectural styles found in Mercer Country are Greek Revival, Italianate and Late Victorian.

Commercial House (added 1983 - - #83000332)
Also known as Henderson House
4th and Main St. , Keithsburg
Centpacrr, Public domain, via Wikimedia Commons
Historic Significance:
Event
Area of Significance:
Commerce
Period of Significance:
1825-1849
Owner:
Private
Historic Function:
Domestic
Historic Sub-function:
Hotel
Current Function:
Vacant/Not In Use
More Information:
Downtown Aledo Historic District (added 2016 - - #16000328)
Aledo, Aledo
Magicpiano, CC BY-SA 4.0, via Wikimedia Commons
Historic Significance:
Event, Architecture/Engineering
Architectural Style:
Late Victorian, Late 19th And 20th Century Revivals
Area of Significance:
Architecture, Commerce, Other
Period of Significance:
1850-1974 AD
Ives, Gideon, House (added 2000 - - #00001332)
408 E. Jefferson St. , New Boston
Magicpiano, CC BY-SA 4.0, via Wikimedia Commons
Historic Significance:
Architecture/Engineering
Architectural Style:
Greek Revival, Second Empire
Area of Significance:
Architecture
Period of Significance:
1850-1874
Owner:
Private
Historic Function:
Domestic
Historic Sub-function:
Multiple Dwelling, Single Dwelling
Current Function:
Domestic
Current Sub-function:
Multiple Dwelling, Single Dwelling
More Information:
Keithsburg Historic District (added 1986 - - #86001004)
Also known as See Also:Commercial House
Roughly bounded by Jackson, Fifth, Washington, and Third Sts. , Keithsburg
Nyttend, Public domain, via Wikimedia Commons
Historic Significance:
Event
Area of Significance:
Commerce
Period of Significance:
1900-1924, 1875-1899, 1850-1874, 1825-1849
Owner:
Private
Historic Function:
Commerce/Trade
Historic Sub-function:
Department Store, Specialty Store
Current Function:
Commerce/Trade
Current Sub-function:
Restaurant, Warehouse
More Information:
Lock and Dam No. 17 Historic District (added 2004 - - #04000177)
173 Lock and Dam Rd. , New Boston
send us a photo to share
Historic Significance:
Event
Area of Significance:
Politics/Government, Military, Maritime History, Social History, Transportation, Economics, Commerce, Conservation
Period of Significance:
1925-1949
Owner:
Federal
Historic Function:
Transportation
Historic Sub-function:
Water-Related
Current Function:
Transportation
Current Sub-function:
Water-Related
More Information:
Mercer County Courthouse (added 1982 - - #82002589)
SE 3rd St. (IL 17) , Aledo
Boscophotos, CC BY-SA 3.0, via Wikimedia Commons
Historic Significance:
Event
Area of Significance:
Politics/Government
Period of Significance:
1875-1899
Owner:
Local
Historic Function:
Government
Historic Sub-function:
Courthouse
Current Function:
Government
Current Sub-function:
Courthouse
More Information:
Mercer County Fairgrounds (added 1997 - - #97000380)
Also known as Mercer County Agricultural Board Fairgrounds
12th Ave., SW., .5 mi. S of jct. with IL 17 , Aledo
Boscophotos, CC BY-SA 3.0, via Wikimedia Commons
Historic Significance:
Event
Area of Significance:
Entertainment/Recreation, Agriculture
Period of Significance:
1925-1949, 1900-1924, 1875-1899
Owner:
Local
Historic Function:
Agriculture/Subsistence, Recreation And Culture, Social
Historic Sub-function:
Agricultural Outbuildings, Animal Facility, Fair, Horticulture Facility, Meeting Hall
Current Function:
Agriculture/Subsistence, Recreation And Culture, Social
Current Sub-function:
Agricultural Outbuildings, Animal Facility, Fair, Horticulture Facility, Meeting Hall
More Information:
Mercer County Jail (added 1997 - - #97000816)
Also known as The Slammer Restaurant;The Great Escape Bed and Breakfast
309 S. College Ave. , Aledo
Boscophotos, CC BY-SA 3.0, via Wikimedia Commons
Historic Significance:
Event, Architecture/Engineering
Architect, builder, or engineer:
Harney Brothers, Drury, Clair F.
Architectural Style:
Tudor Revival
Area of Significance:
Architecture, Law
Period of Significance:
1925-1949, 1900-1924
Owner:
Private
Historic Function:
Domestic, Government
Historic Sub-function:
Correctional Facility, Institutional Housing
Current Function:
Commerce/Trade, Domestic
Current Sub-function:
Hotel, Restaurant
More Information:
Sherrard Banking Company (added 1996 - - #96000092)
314 Third St. , Sherrard
Sherrard Bank owner, CC BY-SA 3.0, via Wikimedia Commons
Historic Significance:
Architecture/Engineering
Architect, builder, or engineer:
Unknown
Architectural Style:
Late Victorian
Area of Significance:
Architecture
Period of Significance:
1875-1899
Owner:
Private
Historic Function:
Commerce/Trade
Historic Sub-function:
Financial Institution
Current Function:
Commerce/Trade, Domestic
Current Sub-function:
Restaurant, Single Dwelling
More Information:
Thompson, James S., House (added 2002 - - #02000846)
804 North St. , New Boston
Josys36, CC BY-SA 3.0, via Wikimedia Commons
Historic Significance:
Architecture/Engineering
Architectural Style:
Italianate
Area of Significance:
Architecture
Period of Significance:
1850-1874
Owner:
Private
Historic Function:
Agriculture/Subsistence, Domestic
Historic Sub-function:
Agricultural Outbuildings, Secondary Structure, Single Dwelling, Storage
Current Function:
Agriculture/Subsistence, Domestic
Current Sub-function:
Agricultural Outbuildings, Secondary Structure, Single Dwelling, Storage
More Information:
United Presbyterian Church (added 1984 - - #80001398)
Main and 8th Sts. , Keithsburg
send us a photo to share
Historic Significance:
Architecture/Engineering
Architect, builder, or engineer:
Thompson & Partridge
Architectural Style:
Greek Revival, Italianate
Area of Significance:
Architecture
Period of Significance:
1850-1874
Owner:
Private
Historic Function:
Religion
Historic Sub-function:
Religious Structure
Current Function:
Education, Social
Current Sub-function:
Civic, Library
Willits, Levi, House (added 1995 - - #95000488)
Also known as New Boston Museum
202 Main St. , New Boston
Boscophotos, CC BY-SA 3.0, via Wikimedia Commons
Historic Significance:
Architecture/Engineering
Architect, builder, or engineer:
Willits, Levi
Architectural Style:
Greek Revival
Area of Significance:
Architecture
Period of Significance:
1850-1874
Owner:
Local
Historic Function:
Domestic
Historic Sub-function:
Single Dwelling
Current Function:
Recreation And Culture
Current Sub-function:
Museum
More Information:
Return to Top
Select a Different Illinois County (map)
Adams
Alexander
Bond
Boone
Brown
Bureau
Calhoun
Carroll
Cass
Champaign
Christian
Clark
Clay
Clinton
Coles
Cook
Crawford
Cumberland
De Kalb
De Witt
Douglas
Du Page
Edgar
Effingham
Fayette
Ford
Franklin
Fulton
Gallatin
Greene
Grundy
Hamilton
Hancock
Hardin
Henderson
Henry
Iroquois
Jackson
Jasper
Jefferson
Jersey
Jo Daviess
Johnson
Kane
Kankakee
Kendall
Knox
La Salle
Lake
Lee
Livingston
Logan
Macon
Macoupin
Madison
Marion
Marshall
Mason
Massac
McDonough
McHenry
McLean
Menard
Mercer
Monroe
Montgomery
Morgan
Moultrie
Ogle
Peoria
Perry
Piatt
Pike
Pope
Pulaski
Putnam
Randolph
Richland
Rock Island
Saline
Sangamon
Schuyler
Scott
Shelby
St. Clair
Stark
Stephenson
Tazewell
Union
Vermilion
Wabash
Warren
Washington
Wayne
White
Whiteside
Will
Williamson
Winnebago
Woodford
Select a Different State (map)
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District Of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Return to Home Page