Landulf of Yariglia (Italian: Beato Landolfo da Vareglate) was Benedictine Bishop of Asti, Italy.
He was born in the latter part of the eleventh century at ‘Vareglate’, which has been identified with the village of Vergiate to the north of Milan, and also with Variglié, a locality near Asti. He studied at the Benedictine monastery of San Pietro in Ciel d'Oro in Pavia, but did not become a monk.