Martin County is a county located in the southeastern part of the state of Florida, in the United States. As of the 2020 census, the population was 158,431. Its county seat is Stuart. Martin County is in the Port St. Lucie, FL Metropolitan Statistical Area. History Martin County was created in 1925 with the northern portion coming from St. Lucie County and southern portion coming from Palm Beach County. It was named for John W. Martin, Governor of Florida from 1925 to 1929. When the county was created, the western contour followed the shore of Lake Okeechobee, as did the borders of Glades, Okeechobee, and Hendry counties. Palm Beach County had historically claimed all of the surface of the lake as part of its area, to its benefit for the distribution of state and federal highway funds. The state representative of Martin County, William Ralph Scott of Stuart, initiated a bill to divide the lake among its adjacent counties, creating a more equitable distribution of state funds for road creation and maintenance. All bordering counties confirmed the justice of this change and supported its ratification, with the exception of Palm Beach County. Representatives from Palm Beach County later presented Representative William Scott with a jug of water, signifying "all the water Bill Scott left Palm Beach County." The jug is in the possession of Stuart Heritage. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (27.8%) is water. It is the fifth-largest county in Florida by land area, and fifty-third largest by total area. Adjacent counties St. Lucie County – north Palm Beach County – south Hendry County – southwest Glades County – southwest Okeechobee County – northwest National protected area Hobe Sound National Wildlife Refuge Environment Martin County Shore Protection Project According to the U.S. Army Corps of Engineers, the Martin County Shore Protection Project includes nourishment of approximately 3.75 miles of beach extending from the St. Lucie County line south to the Stuart Public Beach Park in Martin County. Included in the project is restoration of the primary dune and a 35-foot-wide protective berm. The renourishment interval for this project is every 7 years. The last renourishment of the Martin County Shore Protection Project was completed in May 2013 and included a Flood Control and Coastal Emergency component due impacts incurred with the passage of Hurricane Sandy