Fla. Stat. § 7.59
The boundary lines of St. Lucie County are as follows: Beginning on the eastern boundary of the State of Florida at a point where the north section line of section thirteen, township thirty-seven south, range forty-one east, produced easterly, would intersect the same; thence westerly on the north line of said section and other sections to the northwest corner of section eighteen, township thirty-seven south, range forty-one east; thence south along the range line between ranges forty east and forty-one east which is concurrent with the St. Lucie County and Martin County boundary lines to the intersection with the north line of the south 508.15 feet of the northeast quarter of section twenty-four, township thirty-seven south, range forty east; thence west along the south 508.15-foot line of the northeast quarter of section twenty-four, township thirty-seven south, range forty east and concurrent with the municipal boundary line of the City of Port St. Lucie to the intersection of the east 924.15-foot line of section twenty-four, township thirty-seven south, range forty east; thence south along the east 924.15-foot line of section twenty-four, township thirty-seven south, range forty east and continuing along the municipal boundary line of the City of Port St. Lucie, to the intersection of the south line of the northeast quarter of section twenty-four, township thirty-seven south, range forty east; thence west along the south line of the northeast quarter of section twenty-four, township thirty-seven south, range forty east to the intersection with the west edge of Howard Creek; thence southerly and along with the west edge of Howard Creek being concurrent with the municipal boundary line of the City of Port St. Lucie to the intersection of the north shore of the north fork of the St. Lucie River and the west edge of Howard Creek as concurrent with the City of Port St. Lucie municipal boundary; thence departing said north shore of the north fork of the St. Lucie River and the municipal boundary line of the City of Port St. Lucie, a bearing direction (State Plane Coordinate System, Florida East Zone) of south 45 degrees, 16 minutes west, 2,355 feet more or less, to a point within the body of water of the north fork of the St. Lucie River; thence departing said point a bearing direction (State Plane Coordinate System, Florida East Zone) of south 41 degrees, 4 minutes east, 6,155 feet more or less to a point located in the body of the north fork of the St. Lucie River which intersects with the west line of section thirty, township thirty-seven south, range forty-one east; thence south 6,459 feet along the west line of sections thirty and thirty-one, township thirty-seven south, range forty-one east, to the intersection with the township line between townships thirty-seven and thirty-eight south; also being the southwest corner of section thirty-one, township thirty-seven, range forty-one east; thence west on the said township line to the range line dividing ranges thirty-six and thirty-seven east; thence north on said range line, concurrent with the east boundary of Okeechobee County, to the northwest corner of township thirty-four south, range thirty-seven east; thence east on the township line dividing townships thirty-three and thirty-four south to a point of intersection with the easterly mean high water line of Round Island Creek; thence meandering northwesterly along said mean high water line to its intersection with the north line of Lot 25, plat of Kansas City Colony, as recorded in Plat Book 4, page 23, of the public records of St. Lucie County, Florida. Said north line of Lot 25 lying 150 feet north of, and parallel with, as measured at right angles to, the township line dividing townships thirty-three and thirty-four south; thence east along the north line of said Lot 25 to the west right-of-way line of State Road A1A; thence southeasterly along said right-of-way line to the intersection of said west right-of-way line and a line lying 45.22 feet south of, as measured at right angles to, the township line dividing townships thirty-three and thirty-four south; thence east along said line lying 45.22 feet south of, and parallel with the line dividing townships thirty-three and thirty-four south, to the Atlantic Ocean; thence continuing easterly to the eastern boundary of the State of Florida; thence southerly along said east boundary, including the waters of the Atlantic Ocean within the jurisdiction of the State of Florida, to the place of beginning.
Fla. Stat. § 7.59