State Highway 30 is a state highway in Oklahoma. It runs 84.4 miles (135.8 km) south-to-north along the western edge of the state, from U.S. Highway 62 (US-62) in Hollis to the town of Durham, two miles (3 km) north of SH-33. It passes through Harmon, Beckham and Roger Mills counties. SH-30 does not have any letter-suffixed spur routes branching from it.

In Oklahoma, U.S. Highway 62 (US 62) runs diagonally across the state, from the Texas state line in far southwestern Oklahoma to the Arkansas state line near Fayetteville. US-62 spends a total of 402.48 miles (647.73 km) in the Sooner State. The highway passes through fifteen of Oklahoma's counties. Along the way the route serves two of Oklahoma's largest cities, Lawton and Oklahoma City, as well as many regionally important cities, like Altus, Chickasha, Muskogee, and Tahlequah. Despite this, US-62 has no lettered spur routes like many other U.S. routes in Oklahoma do.