Knox County Courthouse and Hall of Records
Why it's listed
On the public square in Knoxville, Illinois, stand two early county buildings designed by John Mandeville: a brick courthouse and a smaller Hall of Records. The courthouse was designed in 1837, completed in 1839, and first used in 1840. It has soft red locally made brick walls, a gable roof, and a pedimented portico with four Doric columns. The Hall of Records followed in 1854, a one-story brick building with a vestibule and bracketed cornice. Until the county seat moved to Galesburg in 1873, the courthouse held circuit court sessions, including those of Judge Stephen Douglas, as well as the county court, meetings of the Board of Supervisors, and political conventions. Afterward it served as an opera house, then a fire station, and was restored beginning in the 1950s. It now houses the Knox County Museum, while the Hall of Records, once a city library, serves as city hall. A storage shed, war memorial, and reconstructed log cabin on the grounds are noncontributing.
Significance in brief: The buildings are significant under Criterion A for politics and government, since they served as the center of Knox County's government from 1840 until the county seat moved to Galesburg in 1873. The courthouse hosted circuit court sessions, including those of Judge Stephen Douglas, along with the county court, the Board of Supervisors, and political conventions.
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 92000051, listed February 13, 1992. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).
Key facts
| Address | Public Sq., Main St., Knoxville |
|---|---|
| County | Knox County |
| Listed | February 13, 1992 |
| Reference number | 92000051 |
| Resource type | Building |
| Period of significance | 1840-1873 |
| Architect / builder | Mandeville, John (architect); Wheeler, Alvah; Cooley, Zelotes; Fox, Samuel (builders) |
| Architectural style | Greek Revival |
| Criteria |
|
| Areas of significance | Politics/Government |
| Level of significance | Local |
| Status (as stated in the nomination) | The courthouse houses the Knox County Museum and a restored courtroom; the Hall of Records is now used as city hall. |
| Acreage | 1 |
| Coordinates | 40.90827, -90.28430 (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 92000051.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q23302757
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.