Hawaii Metal Detecting Laws — Research Overview

An orientation to metal detecting and treasure hunting rules in Hawaii, covering federal land, state land, private property, and who to verify with. This page is general research information, not legal advice. The state-level summaries below are our own category-level orientation and are not sourced to a Hawaii statute, code section, or agency ruling. Rules change and differ by unit — verify with Hawaii Division of State Parks before detecting.

Public and federal land in Hawaii [UNSOURCED SUMMARY — confirm with the managing federal unit]: Hawaii state parks prohibit metal detecting; native sites are protected by state and federal law. Federal land is also governed nationally by the Archaeological Resources Protection Act (ARPA) and the Antiquities Act, which prohibit disturbing archaeological resources over 100 years old without a permit.

State land in Hawaii [UNSOURCED SUMMARY — confirm with Hawaii Division of State Parks]: Beaches require county permits in some jurisdictions.

Permits, permissions, and best practices in Hawaii [UNSOURCED SUMMARY]: Cultural sensitivity is paramount. Do not disturb iwi (burial sites) or heiau. Always carry written landowner consent for private ground and photograph the permission document.

Terrain and productive regions in Hawaii: Volcanic, coastal, and tropical forest. Very limited LiDAR coverage outside developed islands. Top areas to research include Lahaina (historic), Honolulu waterfront, Pearl Harbor fringes.

Documented cases relevant to legal research in Hawaii: Whaling captain caches; Royal Hawaiian artifacts; WWII naval crash sites — legal status of any recovered items depends on land ownership at the moment of discovery.

Federal rules that apply in Hawaii regardless of state law: ARPA (16 U.S.C. 470aa-470mm) protects archaeological resources 100 years or older on federal and Native American land; NAGPRA (25 U.S.C. ch. 32) governs Native American remains and cultural items; and the National Park Service prohibits metal detector use in park areas under 36 C.F.R. 2.1. Treasure trove and lost-property doctrine are set by state law and are not summarized here.

Verify with the governing agency in Hawaii: Hawaii Division of State Parks (https://dlnr.hawaii.gov/dsp/). Archaeological designations and permitting: the Hawaii State Historic Preservation Office, listed in the NCSHPO directory at https://ncshpo.org/. Federal land: Bureau of Land Management, National Park Service, and USDA Forest Service.