Its land included all of present-day Volusia, Brevard, Indian River, St. Lucie, Marion, Martin, Seminole, Osceola, Orange, Lake, Polk and Palm Beach counties.

[2] In January 1835, the county seat was moved New Smyrna on Bunch's forced-labor farm.

[3] However, the Second Seminole War had largely depopulated Mosquito County of white settlers by the end of that year.

[4] However, by 1840, although the census listed no white inhabitants other than the military personnel based at Fort Pierce and New Smyrna,[2] the county had its own officials.

In 1842, the Armed Occupation Act was passed, providing a quarter section (160 acres or 65 ha) to any head of family who settled on property south of Ocala/Ormond.