Guidobald of Thun (1616–1668) was a Roman Catholic Archbishop of Salzburg, Bishop of Regensburg, and a Cardinal.

He officially assumed the title of Archbishop of Salzburg on 24 September 1654, following his ordination by Cardinal Ernst Adalbert von Harrach.

[2] Guidobald is best known for overseeing the completion of the towers, facade, and domes of Salzburg Cathedral during his time as bishop.

[5] Guidobald was officially confirmed as the Bishop of Regensburg on 16 March 1667.

[2] On 8 May 1668 Guidobald fell through a loose board on a bridge in Hellbrunn, injuring his shin.