This workshop report is based on a workshop held in Tromsoe, Norway, in 2024 about “Other Effective Area-based Conservation Measures” (OECM) in the Nordic regions and the Arctic marine environment. The workshop provided an overview of the current range and understanding of international and national criteria used for the identification of “Other Effective Area-based Conservation Measures” (OECM) in the Nordic regions and the Arctic marine environment. The workshop also shared and discussed case studies that explore the role of Indigenous sustainable management practices, including Indigenous Protected and Conserved Areas (IPCAs), and other Indigenous management approaches.