Fla. Stat. § 7.31

The boundary lines of Indian River County are as follows: Beginning at the northwest corner of township thirty-one south, of range thirty-five east; thence east on the line dividing the townships thirty and thirty-one south, to the point where said line intersects the thread of the south fork of the St. Sebastian River; thence northerly down the thread of said stream to the main stream of the St. Sebastian River; thence down the thread of the St. Sebastian River to its confluence with the Indian River; thence east to the intersection with the southwesterly extension of the centerline of the approach channel to the Sebastian Inlet from the Indian River; thence northeasterly along said centerline and continue northeasterly and easterly along the centerline of the Sebastian Inlet to the Atlantic Ocean; thence southward along the Atlantic coast, including the waters of the Atlantic Ocean within the jurisdiction of the State of Florida to the township line between townships thirty-three and thirty-four south; thence west on said township line to range line dividing ranges thirty-five and thirty-six east; thence north between ranges thirty-five and thirty-six east to the northeast corner of section one, township thirty-three south, range thirty-five east; thence west on township line dividing townships thirty-two and thirty-three south, range thirty-five east to the range line dividing ranges thirty-four and thirty-five east; thence north on said range line to the northwest corner of township thirty-one south, range thirty-five east, being the place of beginning.