Martin County is a county in the U. S. state of Florida, located on the east coast of Florida between St. Lucie and Palm Beach County.
Martin County was created in 1925 with the northern portion coming from St. Lucie County and the southern portion coming from Palm Beach County. It was named for John W. Martin, Governor of Florida from 1925 to 1929.
According to the U.S. Census Bureau, the county has a total area of 753 square miles, of which 556 square miles is land and 197 square miles is water, with the majority of it in the Atlantic Ocean, and Lake Okeechobee. The total area is 26.19% water.
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. There were 65,471 housing units at an average density of 118 per square mile. 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.
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 the age of 18 and 5.20% of those age 65 or over.
