Pennsylvania Route 690 (PA 690) is a 12.53-mile-long (20.17 km) state highway located in Lackawanna and Wayne Counties in Pennsylvania. The western terminus is at PA 502 in Spring Brook Township. The eastern terminus is at PA 590 in Salem Township. The route is a two-lane undivided road running through rural and some developed areas southeast of Scranton. From the western terminus, the route crosses PA 307 and has a partial interchange with Interstate 380 (I-380) before reaching Moscow, where it forms a brief concurrency with PA 435. From Moscow, PA 690 continues northeast to its terminus at PA 590 in Hollisterville. PA 690 was designated in 1928 between U.S. Route 611 (US 611, now PA 435) in Moscow and PA 590 in Hollisterville. The route was extended west to PA 502 in the 1930s.