Uivar (Hungarian: Újvár; German: Neuburg an der Bega) is a commune in Timiș County, Romania.

It is composed of four villages: Pustiniș, Răuți, Sânmartinu Maghiar and Uivar (commune seat).

Archaeological excavations here revealed a Neolithic settlement from the 5th millennium BC that belongs to the Vinča culture.

The village then became German-Hungarian, but over time the Hungarian element dissipated, leaving an overwhelming majority of Germans.

After World War II, their number began to decline sharply and they were gradually replaced by Romanians from other parts of Banat as well as Vojvodina, Transylvania, Western Moldavia and Oltenia.