Royal Blue is an unincorporated community in Campbell County, Tennessee, United States.

The community is along Tennessee State Route 63 near its junction with Interstate 75, 6.1 miles (9.8 km) north-northwest of downtown Caryville.

During that time miners and their families were housed in small single-family homes with running water and outdoor toilets.

Few owned cars and the only other way to travel was by a bus which transported miners from other areas in the morning and returned them in the evening.

c1947 a cinder block school which included indoor bathrooms was built for students through 8th grade.