Captain Sir Humphrey Fleming Senhouse (29 June 1781 – 13 June 1841) was a British Royal Navy officer. He served in the Napoleonic Wars, War of 1812, and First Anglo-Chinese War. In China, he was the senior naval officer of the British fleet from 31 March 1841 until his death on board his flagship, HMS "Blenheim", in Hong Kong from fever contracted during the capture of Canton.