Founder Frank Raulerson began purchasing parcels that would become Cow Creek Ranch in 1923. A former state senator and longtime member of the state’s Livestock Sanitary Board, he made the 23,000-acre Cow Creek Ranch on the St. Lucie/Okeechobee county line his home ranch. He owned two other ranches, Dixie Ranch and Taylor Creek Ranch, of similar size as well as a smaller ranch in Fellsmere. He sold all except Cow Creek before his death at the age of 80 in 1954. His wife, Annie Louise Raulerson, had died in 1951 at the age of 71, and he left his entire estate to his granddaughter, Jo Ann Raulerson Sloan.