Coastal management is practiced in coastal zones—the dynamic interface between land and sea. In the United States, the legal definition under the Coastal Zone Management Act (CZMA) includes:
This broad scope recognizes that activities far inland (like agriculture, urban development, and dam operations) directly affect water quality, sediment flow, and habitat health at the coast. Management efforts involve federal, state, and local agencies working together to balance development, conservation, and hazard mitigation.