Indrapatra Fort, Historical fortification in Ladong village, Indonesia.

Indrapatra Fort is a fortification in Ladong, Great Aceh, about 19 kilometres from Banda Aceh. Records give the site a footprint of 70 by 70 metres; four fort buildings once stood here, and two remain intact, accompanied by two stupas. Nearby structures served as platforms for cannons and ammunition.

Indrapatra Fort was built during the Hindu Lamuri Kingdom, which later turned to Islam, and it stayed in use as a defensive structure through the rise of the Aceh Sultanate. One source records that it served against a Portuguese attack on Aceh. After the Hindu kingdom fell, Sultan Iskandar Muda and Admiral Malahayati still used the fort for defence.

The site is known locally in Acehnese as Kuta Indra Patra, written in Jawoë script as كوتا ايندرا ڤترا. The two surviving structures stand with two stupas, and the surrounding buildings once held cannons and ammunition. The fort stayed in use from the Hindu Lamuri period into the Islamic era, including under Sultan Iskandar Muda and Admiral Malahayati.

The fort sits about 20 kilometers (12 miles) north of Banda Aceh and can be reached by local Labi-labi transport or private vehicles in roughly 20 minutes. Arranging a local guide helps visitors understand the site's full historical context.

Admiral Malahayati, recognized as the first female admiral globally, commanded fleet operations from this strategic coastal location. Her presence at this fort marks a turning point in the region's maritime history.