Michael "Marsh" Marshall (born 13 August 1983) is a British skeptical activist, freelance journalist, public speaker, podcaster, author, blogger and, since September 2020, the editor of The Skeptic magazine. He is the co-founder and vice-president of the Merseyside Skeptics Society and co-host of its official podcast, Skeptics with a K, project director of the Good Thinking Society, and has occasionally written for The Times, The Guardian and New Statesman. As of 2022, Marshall is a fellow with the Committee for Skeptical Inquiry.