Kao Kham (Thai: เก่าขาม) is a tambon (subdistrict) located in the northern region of Nam Yuen district, in Ubon Ratchathani Province, Thailand.

[2][6] The name "Kao Kham" is made up of two parts: Kao เก่า means "old", which refers to the abandoned settlement where the village is located, and Kham ขาม refers to "Ma Kham" (tamarind), a leguminous tree bearing edible fruit that was found numerously in the area before the village was settled.

[2][6] The tambon covers 47.95 km2 and is located in the northern region of the Nam Yuen district.

The area is mostly an undulating plateau and the Lam Dom Yai River basin.

[7] The subdistrict of Kao Kham is subdivided into 13 administrative villages (mubans; หมู่บ้าน).