Old Iroquois County Courthouse
Also known as: Iroquois County Museum
Why it's listed
Built in 1866, the old Iroquois County Courthouse in Watseka is a two-story Italianate building of red brick on a limestone basement, designed by C. B. Leach and built by contractor A. C. Mantor. It housed the county jail and sheriff's quarters in the basement, offices on the first floor, and the courtroom above. A rear addition came in 1881, a second addition in 1927, and the original octagonal tower was rebuilt in square form, with a heavy copper dome later replaced by a mansard top. The courthouse served as the seat of county government for 98 years. After a new courthouse opened in 1964, officials planned demolition, but public protest stopped it. The building stood empty for two years and suffered some vandalism before the Iroquois County Historical Society formed, leased it, and restored it. It now serves as a museum, a genealogical records center, a chapel, and a community meeting place.
Significance in brief: The building served as the seat of Iroquois County government for 98 years, until a new courthouse opened in 1964. When the county planned to demolish it, citizen protests saved it, and the Iroquois County Historical Society restored it and adapted it as a community museum and meeting space.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 75000663, listed June 13, 1975. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | Cherry St. at 2nd St., Watseka |
|---|---|
| County | Iroquois County |
| Listed | June 13, 1975 |
| Reference number | 75000663 |
| Resource type | Building |
| Period of significance | 1866 |
| Architect / builder | C. B. Leach (architect); A. C. Mantor (contractor) |
| Architectural style | Italianate |
| Areas of significance | Politics/Government, Architecture |
| Level of significance | State |
| Status (as stated in the nomination) | Occupied and in use as the Iroquois County Museum, in good condition; run by the historical society under a 99-year lease and staffed by volunteers. |
| Acreage | 1.3 |
| Within district | Watseka Downtown Historic District |
| Coordinates | 40.77441, -87.73566 (NPS GIS) |
What listing means for this property
For a publicly owned building or structure, listing mainly matters when federal funds, permits or licences are involved: projects then go through Section 106 review so effects on the property are considered. Listing also strengthens applications for preservation grants and, for leased income-producing uses, can enable the federal rehabilitation tax credit.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 75000663.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q15263806
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.