http://www.eregulations.com/oklahoma/hunting/hog-regulations/
Hogs may be taken year-round on private land during daylight hours or at night with permission from the private property owner, lessee or occupant of the land.
The pursuit of feral hogs with a shotgun on private property is not restricted by shot size. There is no restriction on method of take of feral hogs on private property.
- Resident & Nonresident License Requirements: No hunting license required. All persons pursuing hogs during any big game gun or muzzleloader seasons with a shotgun and rifled slug, or any rifle or handgun larger than .22 caliber rimfire, must possess either a filled or unfilled license appropriate for that particular big game gun or muzzleloader season, unless otherwise exempt.