Abstract: The olive ridley turtle (Lepidochelys olivacea) is widely distributed throughout Indonesia but is the least studied species of marine turtles in the south-east Asian region. This is the first detailed study of the population structure and migration of olive ridleys in Indonesia, which contributes significantly to the regional understanding of the species. We followed the movement of 9 post-nesting female olive ridleys using satellite telemetry from two geographically separated areas; the Papua Bird’s Head Peninsula and the Western Lesser Sunda region. Results showed that each population used different migration pathways and feeding grounds.