Daeunsan () is a mountain located in Onyang, Ulju County, Ulsan, South Korea. It sits on the boundary between the districts of Oegwang-ri and Unhwa-ri in South Gyeongsang Province. Daeunsan has an elevation of . The mountain was previously named Bulgwangsan.

See also Geography of Korea List of South Korean tourist attractions List of mountains in Korea List of mountains by elevation Mountain portal South Korea portal

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