Maximilian Freiherr von und zu Trauttmansdorff (23 May 1584, in Graz – 8 June 1650, in Vienna), (from 1623 Reichsgraf von und zu Trauttmansdorff) was an Austrian politician and diplomat of the Thirty Years' War era. His other titles included Freiherr von Gleichenberg, Neuenstadt am Kocher, Negau, Burgau und Totzenbach, Herr zu Teinitz. He was a Knight in the Order of the Golden Fleece, Geheimer Rat, Chancellor and Obersthofmeister.
As a long-term counsellor to emperors Ferdinand II and especially to Ferdinand III, he was a leading figure in governing the Empire and the Austrian Erblande. Concluding many treaties for the Empire, he was a principal architect of the Peace of Westphalia where he was the head of the Imperial delegation.