Baldo of Salzburg was a teacher () in the cathedral of Salzburg during the episcopate of Liupram (). He later served as chancellor of King Carloman of Bavaria ().
Baldo was a priest and a writer. His writings include theology, canon law, liturgy and poetry. He sent one religious treatise to King Louis the German (), who wrote a poem, Ad Baldonem, in response requesting clarification. Baldo also wrote a commentary on the Gothic alphabet. He copied excerpts from Ulfilas' Gothic Bible and translated them into Frankish.
Baldo had several Irish connections. The manuscript Vienna, ÃÂsterreichische Nationalbibliothek, 458 (formerly Salzburg 174), containing Adomnán's De locis sanctis, was copied for him. A distich on the flyleaf of reads: ('Baldo had this humble book copied'). A similar notice appears in Graz, Universitätsbibliothek, 790: ('Baldo asked for this humble volume to be written'). It uses the distinctly Hiberno-Latin word .
Baldo's hand has been detected in at least 40 manuscripts from Salzburg. In addition to the two already mentioned, there are: