In 1844, Brevard County was carved out from Mosquito County. When Florida became a state in 1845, Mosquito County was renamed Orange County. On May 12, 1887, Osceola was named a county, having been created from both Orange and Brevard Counties. Osceola County reached all the way down to Lake Okeechobee until 1917 when Okeechobee County was formed. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.