The beatus 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.
Having been ordained a priest his career took him to Milan where, in 1100, he joined Anselm IV, Archbishop of Milan for the Crusade of 1101. He was elected Bishop of Asti in 1105.