Sandwich City Hall & Opera House | |
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| Location | 144 E. Railroad St., Sandwich, Illinois |
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| Coordinates | 41°38′49″N 88°37′13″W / 41.64694°N 88.62028°W |
| Area | less than one acre |
| Built | 1878 |
| Architect | Enos Doan & Israel Doan |
| Architectural style | Second Empire |
| NRHP reference No. | 79003159[1] |
| Added to NRHP | December 6, 1979 |
Sandwich City Hall, which is also known as the Sandwich City Hall & Opera House, is the government center for the city of Sandwich, Illinois, in DeKalb County. The first floor of the building is occupied by city government while the second floor of the historic building houses an active opera house. Sandwich City Hall & Opera House is listed on the National Register of Historic Places and has been since 1979.