Saba Yoi (Thai: สะบ้าย้อย, pronounced [sā.bâː jɔ́ːj]; Pattani Malay: บายอ, pronounced [bāːjɔː]) is the southeasternmost district (amphoe) of Songkhla province, southern Thailand.

The name Saba Yoi is a Thai corruption of sebayu (Jawi: سبايو).

It was upgraded to be Ba Hoi minor district (king amphoe) in 1924.

San Kala Khiri National Park is in Saba Yoi.

The district is divided into nine sub-districts (tambons), which are further subdivided into 62 villages (mubans).