Uster is a city and municipality in the canton of Zürich in Switzerland.

Uster may also refer to:

Uster Castle, in the city of Uster Uster Reformed Church, in the city of Uster Uster (district), a district in the canton of Zürich Uster Technologies, a company in the city of Uster Usteria, a plant genus in the family Loganiaceae Timo Uster (born 1974), a Gambian footballer

See also User (disambiguation) Ulster (disambiguation)