Maimoon Palace or Maimun Palace (Indonesian: Istana Maimun) is an istana (royal palace) of the Sultanate of Deli and a well-known landmark in Medan, the capital city of Northern Sumatra, Indonesia. Today, it serves as a museum. The name is the Arabic word for "blessing".

Built by Sultan Ma'mun Al Rashid Perkasa Alamsyah in the years 1887–1891, the palace was designed by the Dutch architect Theodoor van Erp and covers 2,772 m with a total of 30 rooms. The palace has become a popular tourist destination in the city, not solely because of its historical heritage status, but also because of its unique interior design of the palace, combining elements of Malay cultural heritage, Islamic and Indian architecture, with Spanish and Italian furniture and fittings.

It is the last surviving Malay palace, the rest having been destroyed in the 1946 social revolution. Nearby British troops protected it.

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  Maimun Palace (ca.1890–1905)
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  Interior (1890–1894)
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  Aerial view (1931)
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  Underwent Renovation (2011)
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  Maimun Palace (2013)
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  Main throne in Maimun Palace
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  Meriam Puntung (lit; separated cannon); it is believed to be a powerful cannon that was used by the Deli Sultanate to defeat the Aru Kingdom.

• List of colonial buildings in Medan

Media related to Maimun Palace at Wikimedia Commons

3°34′31″N 98°41′02″E / 3.57528°N 98.68389°E / 3.57528; 98.68389