South Dakota Highway 123
| 467th Avenue | ||||
| Route information | ||||
| Maintained by SDDOT | ||||
| Length | 10.486 mi (16.876 km) | |||
| Existed | 1975–present | |||
| Major junctions | ||||
| South end | US 12 east of Marvin | |||
| North end | SD 15 / CR 9 in Wilmot | |||
| Location | ||||
| Country | United States | |||
| State | South Dakota | |||
| Counties | Grant, Roberts | |||
| Highway system | ||||
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South Dakota Highway 123 (SD 123), 467th Avenue, is a 10.486-mile (16.876 km) north–south state highway in Grant and Roberts counties in South Dakota, United States, that connects U.S. Route 12 (US 12) with South Dakota Highway 15 (SD 15).