Burchard I (died 5 or 23 November 911) was the Duke of Alamannia from 909 to his death and margrave of Raetia Curiensis, as well as Count in the Thurgau and Baar. Born between 855 and 860, he was the son of Adalbert II, Count in the Thurgau. Burchard married Liutgard of Saxony.