| State: | TN |
| Type: | Sec |
| Route: | 312 |
| Map Custom: | yes |
| Map Notes: | SR 312 highlighted in red |
| Length Mi: | 26.8 |
| Established: | July 1, 1983[1] |
| Direction A: | East |
| Terminus A: | in Cleveland |
| Junction: |
|
| Direction B: | West |
| Terminus B: | in Birchwood |
| Counties: | Hamilton, Bradley |
| Previous Type: | TN |
| Previous Route: | 311 |
| Next Type: | Sec |
| Next Route: | 313 |
State Route 312 (SR 312) is a secondary state route in Hamilton and Bradley counties in the US state of Tennessee that runs from Birchwood to Cleveland. The route runs east and west; however, much of the route in Hamilton County runs north and south.
SR 312 begins at an intersection with SR 60 in Birchwood, a small community in northeastern Hamilton County, and travels southwest for approximately 13miles as Birchwood Pike through rural farmland, before turning east and intersecting with SR 58 near Harrison. The route then runs north concurrently with SR 58 for about NaNmiles, before turning east as Mahan Gap Road. The route runs through the community of Snow Hill, and about 2miles later comes to a four-way intersection with Ooltewah-Georgetown Road, a major connector road between the communities of Ooltewah and Georgetown. The route then crosses Mahan Gap in White Oak Mountain, and about NaNmiles later crosses into Bradley County, where it becomes known as Harrison Pike. About NaNmiles later it intersects with Bancroft Road, a connector to McDonald. The route continues for another NaNmiles through a rural residential area, before turning sharp east, and entering the community of Prospect. About NaNmiles later the route crosses I-75, but does not interchange. The route then continues for another 2miles, crossing Candies Creek, Candies Creek Ridge in a gap, and entering Cleveland, before coming to an intersection with US 11 Bypass (Keith Street). The route continues east as Inman Street for another NaNmiles before meeting its eastern terminus with US 11/US 64 (Ocoee Street, Broad Street) in downtown Cleveland. Also at this intersection US 64 splits off from US 11, and continues east as Inman Street.[2]