Heimerad (also known as Heimrad, Haimrad or Heimo, c. 970 in Meßkirch near the Bodensee in Baden – 28 June 1019 on the Hasunger Berg (now Burghasungen) near Kassel) was a German priest and travelling preacher.
After his return to Germany he became a monk in Hersfeld Abbey, but was expelled after a dispute about wearing the order's clothing.
At length he found a site for a hermitage on the Hasunger Berg (today Burghasungen in Zierenberg).
At first mocked and scorned even there, with the passage of time he came to be revered as a saint and his advice was sought by the great: he was acquainted with the Empress Kunigunde, Bishop Meinwerk of Paderborn and Aribo, Archbishop of Mainz.
Aribo, Archbishop of Mainz, had a church built over Heimerad's grave on the Hasunger Berg two years after his death, in 1021, which served as the nucleus of Hasungen Abbey, founded in 1074.