Longwangtang Reservoir (simplified Chinese: 龙王塘水库; traditional Chinese: 龍王塘水庫; pinyin: Lóngwáng táng shuǐkù) is a reservoir located on Longwang River in Guanfang Village, Longwangtang Street, Lyushunkou District, Dalian City, Liaoning Province.

[1] It was built during the Japanese colonial period in Dalian,[2] with construction starting in August 1920 and completed on March 31, 1924.

[3] The height of the dam of Longwangtang Reservoir is 33.9 meters and the length is 326.6 meters.

[4] On one side of the dam is a 33.9-square-kilometer pond; on the other side is a huge 5,000 square meter garden,[5] the Longwangtang Cherry Blossom Park,[6] with over 3000 trees of cherry blossoms.

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