Maratua Island is a part of Derawan chain of Island. The Derawan Islands  are in the province of East Kalimantan in Indonesia. They consist of 31 islands, most well known among these are the islands of Derawan, Kakaban, Maratua, and Sangalaki. There are also numerous submerged reefs and islets. They are located in the Sulawesi Sea, on the coastal shelf of East Kalimantan (2°17′N – 118°13′E).

Derawan islands is part of the Coral Triangle, which contains some of the richest marine biodiversity on earth. Located in a biodiversity hotspot, the Derawan Islands feature 872 species of reef fishes, 507 species of coral, and invertebrates, including protected species (5 giants clam species, 2 sea turtles, coconut crab, etc.). Some of the islands harbor the heavily exploited turtle eggs and yet the largest green turtle nesting site in Indonesia.

This chain of island is on the top 5 diving spot in Indonesia.

Maratua Island has an area of 35.5 square kilometers and has at least 13 caves, but the prediction is that there are more than a hundred caves which are not yet explored.

Its beachline is the nesting spot for big Green Turtle.

On 11 September 2015 Maratua Airport with runway 1,200 meters has been operated to boost tourism. There are currently 2 flights In and Out of Maratua island per week. Samarinda International Airport^[ is the main gateway to Derawan.

It can also be reached by speed boat ( 2 hours ) from Tanjung Redep.