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Martin County, Florida facts for kids

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Martin County, Florida
Seal of Martin County, Florida
Map of Florida highlighting Martin County
Location in the state of Florida
Map of the USA highlighting Florida
Florida's location in the U.S.
Founded May 30, 1925
Seat Stuart
Largest community Palm City
 - Total
 - Land
 - Water

753 sq mi (1,950 km²)
543 sq mi (1,406 km²)
209 sq mi (541 km²), 27.8%
 - (2015)
 - Density

269/sq mi (104/km²)
Time zone Eastern: UTC-5/-4
Named for: John W. Martin
Roosevelt Bridge, Stuart, Florida 001
The new Roosevelt Bridge

Martin County is a county located in the Treasure Coast region in the state of Florida, in the United States. As of the 2010 census, the population was 146,318. Its county seat is Stuart.

Martin County is in the Port St. Lucie, FL Metropolitan Statistical Area.


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.


According to the U.S. Census Bureau, the county has a total area of 753 square miles (1,950 km2), of which 543 square miles (1,410 km2) 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

National protected area

  • Hobe Sound National Wildlife Refuge


Historical population
Census Pop.
1930 5,111
1940 6,295 23.2%
1950 7,807 24.0%
1960 16,932 116.9%
1970 28,035 65.6%
1980 64,014 128.3%
1990 100,900 57.6%
2000 126,731 25.6%
2010 146,318 15.5%
Est. 2015 156,283 6.8%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2015

As of the census of 2000, there were 126,731 people, 55,288 households, and 36,213 families residing in the county. The population density was 228 per square mile (88/km2). There were 65,471 housing units at an average density of 118 per square mile (46/km2). The racial makeup of the county was 89.88% White, 5.27% Black or African American, 0.30% Native American, 0.60% Asian, 0.10% Pacific Islander, 2.72% from other races, and 1.14% from two or more races. 7.50% of the population were Hispanic or Latino of any race.

In 2000 there were 55,288 households out of which 21.50% had children under the age of 18 living with them, 55.00% were married couples living together, 7.40% had a female householder with no husband present, and 34.50% were non-families. 29.00% of all households were made up of individuals and 16.00% had someone living alone who was 65 years of age or older. The average household size was 2.23 and the average family size was 2.71.

In the county, the population was spread out with 18.60% under the age of 18, 5.30% from 18 to 24, 22.90% from 25 to 44, 24.90% from 45 to 64, and 28.20% who were 65 years of age or older. The median age was 47 years. For every 100 females there were 96.40 males. For every 100 females age 18 and over, there were 94.20 males.

The median income for a household in the county was $43,083, and the median income for a family was $53,244. Males had a median income of $36,133 versus $27,000 for females. The per capita income for the county was $29,584. About 5.60% of families and 8.80% of the population were below the poverty line, including 13.80% of those under age 18 and 5.20% of those age 65 or over.



  • Indiantown Airport
  • Naked Lady Ranch Airport (private)
  • Witham Field

Major highways


The Lake Okeechobee Scenic Trail, a segment of the Florida National Scenic Trail, passes through Martin County.


The Martin County Library System has 7 branches.

  • Blake Library
  • Elizabeth Lahti Library
  • Hobe Sound Public Library
  • Hoke Library
  • Peter & Julie Cummings Library
  • Robert Morgade Library
  • Law Library


Florida panther at Audubon Center, Stuart, Florida
Florida panther at Possum Long, September, 1992
  • Audubon of Martin County: Possum Long Nature Center, Palm Beach Road, Stuart
  • Elliott Museum on Hutchinson Island
  • Jonathan Dickinson State Park in South Martin County
  • Martin County Fair held every February.
  • Martin County Public Beaches:
    • Hobe Sound Public Beach on Jupiter Island
    • Jensen Sea Turtle Beach, Stuart Beach and many beach strips on Hutchinson Island.
  • Savannas Preserve State Park (extends into St. Lucie County)
  • St. Lucie Inlet Preserve State Park on Long Island east of Port Salerno and north of Jupiter Island

Historic areas

On the National Register of Historic Places:

  • Hobe Sound
    • Olympia School, 1925
    • Trapper Nelson Zoo Historic District, located south of Hobe Sound is inside Jonathan Dickinson State Park in southern Martin County, 1933
  • Hutchinson Island
    • House of Refuge at Gilbert's Bar, 1876
    • Georges Valentine Shipwreck Site, 1904
  • Indiantown
    • Seminole Inn, 1926
  • Jensen Beach
    • Mount Elizabeth Archeological Site, prehistoric
    • Stuart Welcome Arch, 1926
    • Tuckahoe, 1938
  • Jupiter Island
    • Gate House, 1927
  • Stuart
    • Burn Brae Plantation-Krueger House, 1894
    • Lyric Theatre, 1927
    • Old Martin County Courthouse, 1937

Other historic areas listed in 1989 by the Florida Chapter of the American Institute of Architects:

  • All Saints Episcopal Church, Waveland, 2377 N.E. Patrician Street, 1898,
  • Bay Tree Lodge (Kiplinger House), 143 S. River Road (originally 104 S. Sewall's Point Road), Sewall's Point, 1909
  • Dudley-Bessey House, 110 S.W. Atlanta Avenue, Stuart, 1909
  • Dyer Homestead, 1006 S.W. St. Lucie Crescent, Stuart, 1904
  • Feroe Building, 73 S.W. Flagler Avenue, corner of St. Lucie, Stuart, 1913
  • France Apartments, 524 St. Lucie Crescent, Stuart, 1927
  • Golden Gate Building, 3225 S.E. Dixie Highway in Golden Gate south of Stuart, 1925
  • Kitching House, 210 S.W. Atlanta Avenue, Stuart, 1894
  • Stuart Feed Store, 101 S.W. Flagler Avenue, Stuart, 1905
  • Sunrise Inn, S.E. Old St. Lucie Boulevard, Port Sewall. ca. 1925 (demolished)
  • John E. Taylor House, 204 S.E. Atlanta Avenue, Stuart, 1914

Other places listed in 2012 by the Florida Chapter of the American Institute of Architects in its Florida Architecture: 100 Years. 100 Places.

  • Beach Road 2, Jupiter Island


Downtown Stuart, in the heart of the county seat



Census-designated places

Sunset from the Intracoastal Waterway at Hobe Sound

Other unincorporated places


Images for kids

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