The Tudjuh Archipelago (Indonesian: Kepulauan Tujuh) is a large group of islands in northwestern Indonesia, off of the west and northwest coast of the island of Borneo in the South China Sea. Administratively the islands belong to the Riau Islands province of Indonesia. The Tudjuh Archipelago consists of four island groups, the Badas Islands, the Tambelan Islands, the Natuna Islands, and the Anambas Islands. The southwesternmost extent of the archipelago is 1° 04' S latitude, 105° 10' E longitude.
- "Kepulauan Tudjuh: Indonesia" Geographical Names (Information Technology Associates)
- National Geospatial-intelligence Agency (2005) "Borneo: Northwest Coast and Kepulauan Tudjuh" Sailing directions (enroute): Borneo, Jawa, Sulawesi, and Nusa Tenggara United States National Geospatial-Intelligence Agency
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