Bo Rai (Thai: บ่อไร่, pronounced [bɔ̀ː râj]) is a township and district (amphoe) in Trat province, eastern Thailand, near the Khao Banthat Mountain Range in Cambodia.

The area was known for gemstone mining (rubies and sapphires) and gem trade which made Bo Rai prosper and grow.

From the 1960s until the beginning of the 1990s the town experienced an economic boom, which was ended almost overnight with the exhaustion of the mines through plundering.

The economic depression that followed was further increased by the downfall of the Khmer Rouge and the subsequent end of the border trafficking of goods and gems.

Once the centre of Thailand's gem trade, Bo Rai is now a shadow of its former glory, yet some hope is seen in the migrating refugees coming from the south.