Brevard County 's seat is Titusville . Gradually , the borders of Brevard County were shifted northward while the county got `` pinched '' eastward . The portions of Brevard County in present day Broward and Palm Beach counties were given to Dade County , western areas of the county were given to Polk and Osceola County , and parts of Volusia and Orange Counties were given to Brevard including the eventual county seat of Titusville .