| Johann von Türckheim | |
| Birth Date: | 10 November 1749 |
| Birth Place: | Strasbourg |
| Death Date: | 28 January 1824 |
| Death Place: | Altorf (Ettenheim) |
| Office: | National Constituent Assembly |
| Parliamentarygroup: | Third Estate |
| Constituency: | Strasbourg |
| Term Start: | 8 April 1789 |
| Term End: | 24 November 1789 |
| Spouse: | Dorothea von Seufferheld (1759–1829) |
| Occupation: | Politician, diplomat |
| Mother: | Maria Magdalene, née Henneberg (1720–1793) |
| Father: | Jean de Turckheim (1707–1793) |
| Children: | 8 children, including: Johann von Türckheim (1778–1847) Ferdinand August Josef Freiherr von Türckheim (1789–1848) |
| Relations: | Bernard-Frédéric de Turckheim (brother) |
Johann von Türckheim (10 November 1749 – 28 January 1824) was a French politician and a German diplomat.
Jean de Turckheim was the oldest son of Baron Jean de Turckheim (1707–1793) and a brother of Bernard-Frédéric de Turckheim. His nephew, Jean-Frédéric de Turckheim, was the eighth mayor of Strasbourg.
He was elected as a deputy of Strasbourg to the Estates-General in 1789.[1] Initially supportive of the revolution, he became disenchanted with its goals after the violence of July and August 1790 and became convinced that the unrest was part of a broader plan to overthrow the king and establish a radical republic.[2] After a short term as mayor of Strasbourg, he left France, and offered his services to the Duke of Hesse, whom he served for several years, in particular as envoy to Rome. He died in Altorf (Ettenheim), in the Grand Duchy of Baden in 1824.[3]