Ondenc is a white French wine grape found predominantly in the Gaillac region of southwest France.

[2] Today, the grape is nearly extinct in Australia except for a small amount of plantings in Victoria used in sparkling wine production.

[3] The grape is believed to have originated in southwestern France and at its peak production it was grown as far north as the Côtes-de-Blaye region and as far south as the foothills of the Pyrenees.

In the early 19th century, Ondenc vines were taken to the Cognac region where the grape was known as Blanc Sélection Carrière.

Ondenc cuttings, known as Blanc Select, were also among the grape varieties that James Busby brought to Australia in 1832.