Boniface (III) was the Count of Bologna and Margrave of Tuscany from about 1004 to his death, probably in 1011. He was the son of Adalbert, Count of Bologna, and his wife Bertila.Edoardo Manarini, I due volti del potere. Una parentela atipica di ufficiali e signori nel regno italico, Milano, Ledizioni, 2016, ISBN 978-88-6705-453-4. He succeeded his father in Bologna and was created margrave of Tuscany sometime before 1004. By 1007, he had founded the abbey of Fonte Taona. His son Hugh, Count of Bologna was made Duke of Spoleto.

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1011 deaths Margraves of Tuscany Year of birth unknown House of Boniface {{Italy-noble-stub