Franz Joseph Maximilian Maria Antonius Ignatius Lamoral, 9th Prince of Thurn and Taxis, full German name: Franz Josef Maximilian Maria Antonius Ignatius Lamoral Fürst von Thurn und Taxis was the ninth Prince of Thurn and Taxis and Head of the Princely House of Thurn and Taxis from 22 January 1952 until his death on 13 July 1971.

The Princely House of Thurn and Taxis is a family of German nobility that is part of the Briefadel. It was a key player in the postal services in Europe during the 16th century, until the end of the Holy Roman Empire in 1806, and became well known as the owner of breweries and commissioner of several castles. The family has resided in Regensburg since 1748 with their seat at St. Emmeram Castle from 1803. The family is one of the wealthiest in Germany, and the current head of the House is Albert, 12th Prince of Thurn and Taxis.