Khok Chamrae (Thai: โคกชำแระ) is a tambon (subdistrict) located in the central region of Thung Si Udom district, in Ubon Ratchathani Province, Thailand.

[2] The tambon was founded in 1991 by incorporating eight settlements in the southern part of Nong Om in the Det Udom district.

[3] A year later, both Khok Chamrae and its parent tambon, together with three other subdistricts, including Thung Thoeng, Na Kasem, and Kut Ruea, were split off from Det Udom district to create a minor district (king amphoe) called Thung Si Udom.

[4] However, the inclusion of tambon Thung Thoeng into the new district was undone a year later, on June 1.

[5] After its establishment, the tambon was governed by the Subdistrict Council of Khok Chamrae, until March 3, 1997, when the council was upgraded by the Department of Provincial Administration [th] to be the Subdistrict Administrative Organization of Khok Chamrae.