Offshore state lateral boundaries define part of the geographic extent of the submerged lands that a state holds and manages in the public trust. Well-defined boundaries help a state manage its natural resources and statutory obligations with a measured amount of certainty. However, state lateral boundaries, both on land and at sea, have not always been stable and well defined. The historic record often shows conflicting borders that have led to interstate disagreements, court cases, and in some instances lingering stalemates.

These data show the approximate position of a states offshore lateral boundary based on official and unofficial sources. Some boundaries have been omitted when a sufficient data source could not be found.

Offshore state lateral boundaries define part of the geographic extent of the submerged lands that a state holds and manages in the public trust. Well-defined boundaries help a state manage its natural resources and statutory obligations with a measured amount of certainty. However, state lateral boundaries, both on land and at sea, have not always been stable and well defined. The historic record often shows conflicting borders that have led to interstate disagreements, court cases, and in some instances lingering stalemates.These data show the approximate position of a state's offshore lateral boundary based on official and unofficial sources. Some boundaries have been omitted when a sufficient data source could not be found.Direct data download | MetadataThis item is curated by the MarineCadastre.gov team. Find more information at marinecadastre.gov.