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Connecticut Route 21
 Route 21 | ||||
|---|---|---|---|---|
 Map of Windham County in northeastern Connecticut with Route 21 highlighted in red | ||||
| Route information | ||||
| Maintained by CTDOT | ||||
| Length | 5.67 mi[1] (9.12 km) | |||
| Existed | 1944–present | |||
| Major junctions | ||||
| South end |  Route 12 in Killingly | |||
 US 44 in East Putnam | ||||
| North end |  Route 193 in Thompson | |||
| Location | ||||
| Country | United States | |||
| State | Connecticut | |||
| Counties | Windham | |||
| Highway system | ||||
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Route 21 is a 5.67-mile (9.12 km) state highway in rural northeastern Connecticut. It extends from Route 12 in Killingly to Route 193 in Thompson. It serves as an alternate to Route 12 in the town of Putnam.
- ^ Connecticut State Highway Log Archived 2015-09-05 at the Wayback Machine
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