Over the next century, Thomasville continued to grow and expand. Over the years, many businesses came and others left. These included garment factories, sawmills, and cotton gins. The railroad discontinued its use of the town's depot by the 1950s, but that time also saw the opening of Thomasville's FPS-35 radar base, part of the Air Defense Command's Semi Automatic Ground Environment (SAGE) system, bringing in servicemen and their families. The prototype for the FPS-35 radar was developed at the Thomasville Aircraft Control and Warning Station. The 1950s also saw the planting of roses along Highway 43, the main highway through Thomasville, earning it the nickname of The City of Roses. The 1960s and 1970s saw the opening of numerous paper mills in the area, an industry that continues to be important to the economy of Thomasville today. This time also saw businesses begin to relocate from downtown to the main highway. The Thomasville Historic District was designated in 1999 by the National Register of Historic Places.
