U.S. laws governing the killing of a squirrel or any other "nuisance animal" vary from state to state. In many cases, it is legal to kill a squirrel, but permits are required and limitations are imposed on the use of specific methods for doing so, as explained by the Georgia Department of Natural Resources. Because each state, and often each city or county, determines its own regulations concerning wildlife, it is important to contact the state's Department of Fish and Wildlife or Department of Natural Resources to determine the applicable laws for a particular area.
A squirrel is considered a nuisance animal in Georgia, and it is legal for civilians to kill one, according to the Georgia Department of Natural Resources. A variety of traps are allowable for this purpose, including leghold traps, box and cage traps, rat snap traps and box choker traps, as are shotguns with No. 6 shot. Appropriate permits are required for the possession of a firearm, and restrictions are in place for where a firearm can be discharged.
In cases in which killing the animal is not permissible, or the affected person is not willing to do so, other actions may be appropriate, such as habitat modification or trap and release. The Minnesota Department of Natural Resources requires that citizens contact a permit officer about the trapping, killing or relocating of any nuisance animals, and many other jurisdictions have similar requirements.