Wolnzach was first mentioned in the foundation document of Wessobrunn Abbey in 756, by the name of Wolamotesaha. In 1150 there occurs the first documentary reference to Wolnzach as the site of a market.
In 1926, the German Hop Research Society established a research site in Hüll near Wolnzach, which would develop into the Hop Research Center Hüll in 1962.