English: There are four primary education service area offices (PESA) in Chiang Rai Province, as illustrated, responsible for primary schools affiliated with the Office of Basic Education Commission of Thailand (OBEC).
Chiang Rai PESA 1 (blue) covers districts of Mueang Chiang Rai, Wiang Chai, and Wiang Chiang Rung.
Chiang Rai PESA 2 (yellow) covers districts of Mae Lao, Mae Suai, Pa Daet, Phan, and Wiang Pa Pao.
Chiang Rai PESA 3 (green) covers districts of Chiang Saen, Doi Luang, Mae Chan, Mae Fa Luang, and Mae Sai.
Chiang Rai PESA 4 (red) covers districts of Chiang Khong, Khun Tan, Phaya Mengrai, Thoeng, and Wiang Kaen.