Timothy David Spector OBE FMedSci is a British epidemiologist and science writer. Spector is professor of genetic epidemiology and director of the TwinsUK registry at King's College, London. He is a specialist in twin studies, genetics, epigenetics, and microbiome and diet. He was appointed Officer of the Order of the British Empire (OBE) in the 2020 Birthday Honours for services to the Covid-19 response.