Wyoming Highway 312 (WYO 312) is a 7.30-mile-long (11.75 km) north–south Wyoming State Road located in central Platte County, Wyoming that runs from Wyoming Highway 34 to I-25 BUS/US 87 BUS in Wheatland.

Wyoming Highway 312 begins at its south end at Wyoming Highway 34, south-southwest of Wheatland, and travels north towards Wheatland. At about 6.2 miles (10.0 km), WYO 312 enters the city limits of Wheatland, and is named South Street, as the route turns east to head to an end at I-25 BUS/US 87 BUS and the eastern terminus of Wyoming Highway 310.

Wyoming Highway 312 is the original path that Wyoming Highway 34 used to take into Wheatland before it was realigned to go directly to the Interstate 25.

The entire route is in Platte County.

Location	mi	km	Destinations	Notes
​	0.00	0.00	WYO 34
Wheatland	7.30	11.75	I-25 BL / US 87 Bus. / WYO 310 north	Eastern terminus of WYO 310
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

• Wyoming State Routes 300-399
• WYO 312 - WYO 34 to I-25 BUS/US 87 BUS/WYO 310
• Wheatland, WY Homepage