Birchwood is an unincorporated community in Hamilton and Meigs counties in Tennessee, United States. It is a rural area located along Tennessee State Route 60 and Tennessee State Route 312 northwest of Chattanooga. It is part of the Chattanooga, TN–GA Metropolitan Statistical Area. According to the 2022 American Community Survey the 37308 Zip Code Tabulation Area had a total population of 2,663.