St. Amant (or Saint Amant) is an unincorporated community located in Ascension Parish, in the U.S. state of Louisiana. This community has not been incorporated into a city or town. It is situated about 25 miles south-east of Baton Rouge. and 50 miles north west of New Orleans. It is named after the St. Amant family, some of the early settlers in the region. The Saint Amant post office has the ZIP code of 70774.