Belvidere South State Street Historic District | |
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| Location | State Street between Logan Avenue & Madison Street, Belvidere, Illinois |
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| Coordinates | 42°15′21″N 88°50′23″W / 42.25583°N 88.83973°W |
| Area | 16 acres (6.5 ha) |
| Built | 1852 |
| Architect | Multiple |
| Architectural style | Italianate, Commercial Style, Prairie School, Art Deco, Modern Movement |
| NRHP reference No. | 12000325[1] |
| Added to NRHP | June 6, 2012 |
The Belvidere South State Street Historic District is a historic district on the north side of the Kishwaukee River in Belvidere, Illinois. It is primarily composed of commercial building representative of architectural trends from 1852 to 1962, the period following the connection of the city to the Galena and Chicago Union Railroad.