The greater part of the Galibi-Marworno population lives in the Uaça Indigenous Area (AI), which has been homologated and officially registered, consisting of 470,164 hectares, in the municipality of Oiapoque, in the northern part of the state of Amapá. The Uaçá River, the major reference point for these people, flows into the same estuary as the Oiapoque River, which demarcates the border between Brazil and French Guiana. Several Galibi-Marworno families reside in the Juminã Indigenous Area, which has 41,601 hectares, near the Juminã stream, which flows into the Oiapoque River. The Juminã Indigenous Area is located between the Uaçá and Galibi indigenous areas, and also has as its northern boundaries the Uaçá and Oiapoque rivers.