"Arizona Law" is codified in a myriad of sources, from the common law set forth in judicial decisions of the Arizona Courts since the Territorial days, to the local ordinances of the State's smallest municipalities.

In addition to criminal statutes that prohibit trespassing upon public or private land and may lead to criminal prosecution where a trespass occurs, Arizona courts have recognized a civil cause of action for trespass, allowing claimants to sue others who cause injury to their property.