Șag borders Timișoara to the north, Sânmihaiu Român to the northwest, Parța to the southwest, Pădureni to the south and Giroc to the east.

[2] According to the archeological researches and some objects found in the Timiș River, it seems that the nucleus of the village dates from the 4th–5th millennium BC.

[4] Sag is first mentioned in the papal tithe records of 1332 as Sad,[5] in Old Serbian meaning "to step over water".

[6] The settlement was inhabited during the Middle Ages, because between 1404–1425 it appears in documents as the property of Count Laurențiu Șaghi.

In 1759, Dutch engineer Maximilian Emmanuel Fremaut [de] implemented a plan to dam the Timiș River, which is given a straight riverbed, and the multitude of arms that formed swamps spread over the entire southern part of Timișoara are gradually dried up and dismantled.

If the first attempts at colonization with Germans failed due to diseases, later the settlers began to willingly move here.

Also, the repeated dammings of Timiș (1759–1769, 1889–1900, 1912–1914) make the locality to be protected from floods and consequently lead to a spectacular growth of agriculture, translated into a high wellbeing of its inhabitants.