Okla. Stat. tit. 19 § 866.17
Whenever the commission of such county shall make and certify to the board of county commissioners of such county a zoning plan, including both the full text of the zoning resolution and proposed regulations and map or maps, representing the recommendations of the commission for the regulation by districts or zones, of the location, height, bulk, number of stories and size of buildings and other structures in the areas of the county, not included within the territorial jurisdiction of the municipality as herein defined, and the percentage of the lot or area which may be occupied, the size of yards, courts, and other open spaces, the density and distribution of population, the uses of buildings, structures, and land for trade, industry, residence, recreation, civic, and public activities and other purposes, then the board may exercise the powers granted and, for the purposes mentioned in 19 O.S. 1961, Section 866.16, may divide the areas of such county located within three miles of such municipality or within one-fourth mile of a state or federal highway, and not included within the territorial jurisdiction of the municipality or within another incorporated municipality, into districts or zones in such number, shape, and areas as it may determine and, for said purposes, may regulate the erection, construction, reconstruction, conversion, alteration, and uses of buildings and structures and the uses of land. All such regulations shall be uniform for each class or kind of buildings throughout each district, but the regulations in one district may differ from those in other districts. In every county of this state having an upstream terminal port and turnaround where navigation ends, or in any county containing all or any part of a reservoir or reservoirs constructed by the United States Army Corps of Engineers, such county is hereby granted authority, at the discretion of the board of county commissioners, to divide all or any part of unincorporated areas of such county into districts or zones in such number, shape, and areas as it may determine and, for said purposes, may regulate the erection, construction, reconstruction, conversion, alteration, and uses of buildings and structures and the uses of land. All such regulations shall be uniform for each class or kind of buildings throughout each district, but the regulations in one district may differ from those in other districts.
Okla. Stat. tit. 19, § 866.17