Aðalsteinn Aðalsteinsson (born 25 April 1962) is an Icelandic former footballer, who played as a midfielder, and now a football manager. He won four caps for the Iceland national football team between 1982 and 1990. He is currently the manager of 4. deild karla team Ungmennafélagið Skallagrímur. He was appointed manager in 2015.