State Route 230 is a secondary state highway located in Humphreys County and Hickman County in Middle Tennessee. It consists largely of former county highways that were designated as a state route in order to ensure adequate ongoing maintenance funding.

State Route 230 runs from its western terminus at State Route 13 in Humphreys County south of Waverly roughly southeast to the rural community of Bold Spring. This portion of the highway is known as Bold Spring Road. From Bold Spring, the highway runs roughly south until it enters Hickman County; it crosses Interstate 40 shortly thereafter. From this point it trends largely east, passing through the rural community of Spot and the former Hickman County seat, Vernon. Meeting State Route 48 at the community of Nunnelly, it is overlain by 48 until the 48-State Route 100 junction in eastern Centerville. From there it is overlain by 100 until just west of Lyles where it splits from Tennessee 100, again running south and through the small community of Littlelot. This portion of the highway is known as Littlelot Road. Just south of Littlelot is the eastern terminus along State Route 50.