Umm an Nasan island (Arabic: ام النعسان) is the fifth largest island in Bahrain. It is 17.5 km (10.9 mi) west of the capital, Manama, on Bahrain Island.

Umm an Nasan is privately owned by (former) Prime Minister Khalifa bin Salman Al Khalifa, and is off limits to ordinary citizens. There is little development on the island other than three palaces for the King and some gardens. There is also a small population of black buck introduced to the island. The small Umm an Nasan village is located on the west coast, and has some nomadic families which care for the deer and gazelles of the island.

Umm an Nasan lies in the Gulf of Bahrain in Persian Gulf to the west of Bahrain Island, and to the east of the Saudi coastal city of Khobar.

The island belongs to Northern Governorate.

• North Palace
• Southwest Palace
• Palace at the Sea
• Umm an Nasan village
• Security village

Umm an Nasan is connected to Bahrain Island and to Khobar, Saudi Arabia through the King Fahd Causeway. Umm an Nasan is connected to Jidda Island through the Jidda Causeway.

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  Map 1
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  District Map
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  Umm an Nasan

• List of islands of Bahrain

• Article about politics of the island, Abbas al Murshid