Khun Han (Thai: ขุนหาญ, pronounced [kʰǔn hǎːn]) is a district (amphoe) in the southern part of Sisaket province, northeastern Thailand.

Neighboring districts are (from the west clockwise): Phu Sing, Khukhan, Phrai Bueng, Si Rattana, and Kantharalak of Sisaket Province, and Oddar Meancheay of Cambodia.

The district is divided into 12 sub-districts (tambons), which are further subdivided into 145 villages (mubans).

Other sub-district municipalities are Si, Krawan, Non Sung, Kanthrom, and Pho Krasang, each covering the same-named sub-district except those areas belonging to Khun Han municipality.

The remaining seven sub-districts each have a tambon administrative organization (TAO).