The purpose of this digest is to present information that has been compiled, reviewed, and summarized pertaining to airport-specific legislation of each state, including laws establishing, developing, operating, expanding, and funding airports. The compilation focuses on legislation expressly applicable to public airports rather than legislation applicable to local governments generally. It compares and contrasts zoning and land use; purchasing authority; commercial operations; ground transportation, funding, and taxing authority; law enforcement; and sovereign immunity. This digest seeks to provide policy-makers, airport operators, and other practitioners a convenient and synthesized resource of airport-specific legislation of all states. It should be useful to attorneys, legislators, administrators, airport planning officials, financial officials, community participants, and all persons interested in the legal structure for airport development and operations.