Arkansas Highway 178 is a state highway that runs in Marion and Baxter counties. It runs north to Bull Shoals Lake and Midway before terminating near Norfolk Lake.
AR 178 begins in Flippin and runs north past the Marion County Regional Airport to Bull Shoals. It crosses the river at the Bull Shoals Dam into Baxter County and Bull Shoals State Park and Lakeview. It then heads south with AR 126 at Midway to Pilgrim Rest, where it begins heading east as a scenic route. The route runs through Mountain Home to Norfolk Lake, where the route terminates.