State Route 284 is a short state highway in Plumas County, California. It is a spur route off from State Route 70 in Chilcoot connecting to Frenchman Lake.

The route begins at State Route 70 at Chilcoot. It then continues north to its north end at the Frenchman Lake Recreation Area at Frenchman Lake.

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, and do not necessarily reflect current mileage. The entire route is in Plumas County.