Fla. Stat. § 7.05
The boundary lines of Brevard County are as follows: Beginning in the thread of the St. Johns River where the line dividing townships twenty-one and twenty-two south, intersects said river; thence east on said township line to the range line dividing ranges thirty-three and thirty-four east; thence north on said range line to where the same intersects the line dividing townships nineteen and twenty south; thence east on said township line to the Atlantic Ocean; thence southward along the Atlantic coast, including the waters of the Atlantic Ocean within the jurisdiction of Florida, to the intersection with the centerline of the Sebastian Inlet produced eastwardly, said inlet being in section twenty of township thirty south range thirty-nine east; thence westerly on said centerline and continuing southwesterly along the centerline of the approach channel to said inlet from the Indian River to a point due east of the mouth of the St. Sebastian River; thence due west to the mouth of the St. Sebastian River; thence south along the thread of the St. Sebastian River and the thread of the south fork of the St. Sebastian River to a point where the line dividing townships thirty and thirty-one south intersects the thread of said south fork; thence west on said township line to the line dividing ranges thirty-four and thirty-five east; thence north on said range line to the northeast corner of township twenty-five south, range thirty-four east and the St. Johns River; thence northerly following the thread of said river to the point of beginning.
Fla. Stat. § 7.05