Oberwinterthur (Swiss Standard German pronunciation: [ˈoːbərˌvɪntərtuːr], lit. 'Upper Winterthur ') is a district in the Swiss city of Winterthur. It is district number 2.

The district comprises the quarters Talacker, Guggenbühl , Zinzikon , Reutlingen, Stadel, Grüze , Hegmatten and Hegi .

Oberwinterthur was formerly a municipality of its own, but was incorporated into Winterthur in 1922, and the location of the Roman Vicus Vitudurum .

Oberwinterthur railway station is a stop of the Zürich S-Bahn on the lines S8, S29 and S30.