Southeast Arcadia is a census-designated place (CDP) in DeSoto County, Florida, United States.

[5] According to the United States Census Bureau, the CDP has a total area of 7.3 square miles (18.9 km2), all land.

There were 2,230 housing units at an average density of 305.3 per square mile (117.9/km2).

19.5% of all households were made up of individuals, and 10.8% had someone living alone who was 65 years of age or older.

The racial and ethnic composition of the population was 52.3% Mexican, 4.5% other Hispanic, 37.2% non-Hispanic white, 4.9% black or African American, 0.6% Native American, 0.1% Asian Indian, 0.2% other Asian, 0.2% non-Hispanic reporting some other race and 3.4% from two or more races.