Signal Mountain is a town in Hamilton County, Tennessee, United States. The town is a suburb of Chattanooga and is located on Walden Ridge. "Signal Mountain" is used as a colloquial name for the part of Walden Ridge close to the town. The town population was 8,852 as of the 2020 census and estimated to be 8,567 in 2018.

Hamilton County is a county located in the U.S. state of Tennessee. It is located in the southern part of East Tennessee on the border with Georgia. As of the 2020 census, the population was 366,207, making it the fourth-most populous county in Tennessee. Its county seat is Chattanooga, located along the Tennessee River. The county was named for Alexander Hamilton, the first secretary of the treasury.