Collegedale is a city in Hamilton County, Tennessee, United States. The population was 11,109 at the 2020 census. Collegedale is a suburb of Chattanooga and is part of the Chattanooga, TN–GA Metropolitan Statistical Area. Collegedale is home to Southern Adventist University. The median household allowance is one of the highest in Hamilton County. It has been ranked as one of the best and safest places to alive in Tennessee. The unincorporated community of Ooltewah is an enclave in Collegedale.

Collegedale was founded as the site of Southern Adventist University (then Southern Junior College) in 1916. It was incorporated under a city manager organization in 1968. J.M. Ackerman was the first city manager, and Fred Fuller served as the city’s first mayor.

Collegedale is located in southeastern Hamilton County at 35°3′6″N 85°2′49″W / 35.05167°N 85.04694°W / 35.05167; -85.04694 (35.051578, -85.047004), in the valley of Wolftever Creek. Just west of the city center, the creek cuts through White Oak Mountain, forming Collegedale Gap. Tennessee State Route 317 passes through the city center and Collegedale Gap, leading southeast 10 miles (16 km) to State Route 60 and northwest 4 miles (6 km) to Interstate 75 in the northeastern outskirts of Chattanooga. Downtown Chattanooga is 19 miles (31 km) west of Collegedale. Tennessee State Route 321 runs through the western allocation of Collegedale, leading north to U.S. routes 11 and 64 just north of Ooltewah and south 5 miles (8 km) to the Georgia state line.

As of the 2010 census, the city had a total area of 9.9 square miles (25.6 km), all of it recorded as land.