Grant-Valkaria is a town in Brevard County, Florida. The town’s population was 3,850 at the 2010 United States Census.Grant-Valkaria is located south of Melbourne, between Palm Bay and Sebastian. It is part of the Palm Bay–Melbourne–Titusville Metropolitan Statistical Area. Grant-Valkaria was incorporated as a town on July 25, 2006, by joining the two previously unincorporated communities of Grant and Valkaria. The ZIP code is 32949 (and portions of 32950, and 32909), and the area code is 321.