Lieutenant-General Sir Joseph Thackwell (1 February 1781 – 8 April 1859) was a British Army officer. He served with the 15th Hussars in the Peninsular War at the Battle of Sahagún in 1808 and the Battle of Vitoria in 1813, and he lost his left arm at the Battle of Waterloo in 1815. He commanded the regiment from 1820 to 1832. He then served in India, commanding the cavalry in the First Anglo-Afghan War of 1838–89, and at the Battle of Sobraon in the First Anglo-Sikh War of 1845–46, and at the Battle of Chillianwala and Battle of Gujrat in the Second Anglo-Sikh War of 1848–9. He also commanded the 3rd The King's Own Dragoons, was colonel of the 16th Lancers, and was appointed Inspector-general of cavalry.