| Charles Thomas | |
| Full Name: | German: Karl Thomas |
| Reign: | 11 March 1735 – 6 June 1789 |
| Reign-Type: | Period |
| Predecessor: | Dominic Marquard |
| Successor: | Dominic Constantine |
| Succession: | Prince of Löwenstein-Wertheim-Rochefort |
| Spouse: | Princess Maria Charlotte of Schleswig-Holstein-Sonderburg-Wiesenburg Maria Josepha von Stipplin (morganatic) |
| Issue: | Leopoldine, Princess of Hohenlohe-Waldenburg-Schillingsfürst |
| House: | House of Löwenstein-Wertheim-Rochefort |
| Father: | Dominic Marquard, Prince of Löwenstein-Wertheim-Rochefort |
| Mother: | Landgravine Christine of Hesse-Wanfried |
| Birth Date: | 7 March 1714 |
| Birth Place: | Augsburg |
| Death Place: | Kleinheubach |
Charles Thomas, 3rd Prince of Löwenstein-Wertheim-Rochefort (7 March 1714 – 6 June 1789) was from 1735 to 1789 the third Prince of Löwenstein-Wertheim-Rochefort.
Charles Thomas was the eldest son and second children of Dominic Marquard, 2nd Prince of Löwenstein-Wertheim-Rochefort (1690–1735) and his wife Christine Franziska Polyxena (1688-1728) a daughter of Charles, Landgrave of Hesse-Wanfried by his second wife Countess Juliane Alexandrine of Leiningen-Dagsburg.
On 7 July 1736 in Vienna he married Princess Maria Charlotte of Holstein-Wiesenburg (1718–1765), daughter of Leopold, Duke of Schleswig-Holstein-Sonderburg-Wiesenburg. Their only child and daughter Leopoldine (1739 - 1765) married in 1761 her cousin, Charles Albert II, Prince of Hohenlohe-Waldenburg-Schillingsfürst (1742-1796).
After the death of his first wife, he married morganatically on 4 February 1770 Maria Josepha von Stipplin (1735-1799). This marriage was without issue.
Charles Thomas studied in Prague and in Paris. From 1735 he was a corresponding member of the Académie française and during his life he hold a large library.[1]
On 4 May 1758 he was made a Palatine Lieutenant General and on 31 December 1769 imperial Lieutenant Fieldmarshal.
After more than fifty years as reigning prince and without legitimate male heirs, Charles Thomas was succeeded after his death by his nephew, Dominic Constantine (1762-1814), son of his youngest brother Prince Theodor Alexander of Löwenstein-Wertheim-Rochefort (1722-1780).