State Route 184 (abbreviated SR 184) is a 12.92 miles (20.79 km) long highway in West Tennessee, running between the cities of Troy and Union City.

SR 184 begins at Troy as a rural two-lane secondary highway at an intersection with SR 21 and continues parallel to the US 51/SR 3 expressway for its first 8.5 miles (13.7 km).

Within Union City, SR 184 is a 5-lane undivided highway and follows E. Reelfoot Avenue for approximately 1.75 miles (2.82 km) as a hidden concurrency with US 45W.

SR 184 turns northerly at Miles Street for 0.86 miles (1.38 km) and then turns northwesterly along Nailing Drive before terminating at the SR 22 freeway.

SR 184 from Troy, Tennessee to Union City, Tennessee represents the old two-lane alignment of US 51 & SR 3.