Signal Mountain is a town in Hamilton County, Tennessee, United States. The town is a suburb of Chattanooga and is located on Walden Ridge, a land mass often mistakenly referred to as "Signal Mountain" itself. Signal Mountain is also used as a colloquial name for part of the Walden Ridge close to the town. The town population was 7,554 as of the 2010 census. The population for zip code 37377 was 15,310 as of the 2010 census.