Assel (Russian: Ассель; Bashkir: Әселе, Äsele) is a river in Russia, that flows through Bashkortostan and the Orenburg Oblast.

The river mouth is 14 km along the left bank of the Bolshoy Ik.

The river is 51 km long and the catchment area is 358 km².

At 11 km from the mouth, the river Yuldybayevo flows into the left bank.

The part эсе means "solonchak", and -ле is a word-formation affix.