State Route 189 (SR 189) is a short 5.5-mile-long (8.9 km) north–south state highway in Crockett County, Tennessee, connecting the towns of Maury City and Friendship.

It passes through neighborhoods as it heads northwest, then north, to bypass downtown.

The highway then leaves Maury City and heads through farmland and rural areas to have an intersection with Reynolds Road, a connector to SR 152.

SR 189 continues north through farmland to enter the Friendship city limits, where it comes to an end at an interchange with US 412/SR 20.

[2][3] SR 189 follows the former alignment of US 412/SR 20 between Maury City and Friendship prior to the four-lane divided highway being built.