Mercer County Courthouse
Many listed buildings are private homes. Please enjoy them from the street.
About Mercer County Courthouse
Mercer County Courthouse, at SE 3rd St. (IL 17), was added to the National Register of Historic Places on Jun 17, 1982: the first place in Aledo to be listed. Only 545 of Illinois’s 1,939 listings are older. The Register lists it for its politics, at the local level. It describes its style as Romanesque, as it does for 42 other Illinois listings. Two more Register listings are within a quarter mile.
What it isLocal government building in the United States. From Wikidata (CC0). Read about it on Wikipedia ↗
PDFRead the original nominationThe form that put it on the Register, with its history, photos and a map · 16 MB · National Archives↗1894 to today
- 1894Built, designed by Mifflin E. Bell
- 1982Added to the National Register of Historic Places
- 2026On the Register for 44 years
Make it a walk: 3 landmarks in about 5 minutes
SE 3rd St. (IL 17), Aledo · about 0.2 miles on foot, as the crow flies
- 1Mercer County CourthouseStart here
- 2
Mercer County JailTudor Revival · next door - 3
Downtown Aledo Historic DistrictDistrict · 0.1 mi on
1 more Register listing within 2 miles
★ National Historic Landmark · D district · B building · S site. Each opens its own page.
Romanesque style, nearby
Other National Register listings within 25 miles described as Romanesque.
Memories of Mercer County Courthouse
The record says what it is. Neighbors know what it means.
Your answer becomes a post in Town Square.
Questions about Mercer County Courthouse
Is Mercer County Courthouse on the National Register of Historic Places?
Yes. It was added on Jun 17, 1982 (Register number 82002589).
Is Mercer County Courthouse a National Historic Landmark?
No. It is on the National Register; Illinois has 86 National Historic Landmarks. The nearest is Rock Island Arsenal, 24.4 miles away.
Can you visit Mercer County Courthouse?
Our record doesn’t say whether it is open to visitors. Many listed buildings are private, so it may only be seen from the street.
Where can I read the history of Mercer County Courthouse?
In its National Register nomination, the form that put it on the Register: a 16 MB PDF at the National Archives, linked on this page.
Sources: National Park Service, National Register of Historic Places (05/22/2026) · National Archives catalog record 28893735 · Wikidata. Map tiles © OpenStreetMap contributors.