Alexander Vyacheslavovich Demin (; born 23 September 1988, Rostov-on-Don) is a Russian political figure and a deputy of the 8th State Duma.
In 2009 he graduated from the Psychology Department of the Modern University for the Humanities. In 2015 he graduated from the Southern Federal University in Rostov-on-Don.
From 2006 to 2009 Demin worked as an educator in the children's health camp Beryozka. From 2009 to 2010 he served at the Russian Space Forces. In 2012 he also worked as a counsellor at the Orlyonok. In 2020 he joined the New People party. Since September 2021 he has served as deputy of the 8th State Duma.
He was sanctioned by the UK government in 2022 in relation to the Russo-Ukrainian War.