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 the area code is 321.