Fort Oranje, Dutch colonial fort in Ternate City, Indonesia.

Fort Oranje is a colonial-era fortification in Ternate characterized by four stone bastions linked by thick defensive walls arranged in a geometric pattern. The complex features an elevated rampart system that runs along the entire perimeter, creating multiple levels for military operations.

The fort was constructed in 1607 by Cornelis Matclief de Jonge and replaced an earlier Portuguese fortification on the site. It became the headquarters of the Dutch East India Company in North Maluku, serving as the center of European commercial control in the region.

The fort's name comes from the House of Orange, given in 1609 by Paul van Carden, though the earlier name Fort Malay stayed in use for years. Nearby settlements historically housed Chinese, Arab, Malay and Makassar traders. Today the area has cafes and a weaving workshop where visitors can learn about wastra textiles.

Fort Oranje stands on Jalan Hasan Boesoeri in Gamalama, Ternate Tengah, about 3.5 km from Sultan Babullah Airport, roughly 20 minutes by road. The site is in the city centre, so it is reached on foot or by short road transfer. A city park and shops now stand in front of the fort.

The fort's stone walls contain visible layers of repairs and modifications made across different centuries, revealing how the structure was adapted and maintained over time. These modifications show how the defenses were repeatedly improved to meet changing military needs.