State Route 422 (SR 422), also known as Long Island Road, is a short 2.38-mile-long (3.83 km) north-south state highway located entirely in the city of New Hope, Tennessee.

[1] It connects various neighborhoods of the city with its main business district and the Alabama state line.

SR 422 is a winding two-lane road for its entire length.

[2][3] The entire route is in New Hope, Marion County.