Château Sigalas-Rabaud was originally part of Château Rabaud until the latter was divided up in 1903 into Sigalas-Rabaud and Rabaud-Promis. The two properties were then reunited in 1929 before being partitioned again in 1952. Sigalas-Rabaud is located in the commune of Bommes and its 33 hectares of vineyards border those of Rabaud-Promis and Rayne-Vigneau.

Sigalas-Rabaud consists of 14 hectares of vineyards planted with 98% Sémillon and 2% Sauvignon Blanc. The grapes are harvested in "tries" and are then fermented in oak barrels (33% new) where they remain for 18-20 months.

Sigalas-Rabaud's wines were always of good quality but in the 1980s the proprietor, Comte Emmanuel de Lambert des Granges, sold a part share to Domaines Cordier, owners of Lafaurie-Peyraguey. Their input resulted in a string of superb wines at the end of the 1980s and through to the end of the century. The wines can be enjoyed in youth but really benefit from 8-10 years of cellaring.

Sigalas-Rabaud is classified as a 1er Cru Classé.