Marco Marchei (born 2 August 1954 in Castignano, Ascoli Piceno) is a retired male long-distance runner from Italy.

He twice competed for his native country at the Summer Olympics: in 1980 and 1984. Marchei set his personal best (2:11.47) in the men's marathon on 14 August 1983 at the World Championships. He is the father of Valentina Marchei.

• All results regarding marathon, unless stated otherwise

Year	Competition	Venue	Position	Notes
Representing  Italy
1980	Olympic Games	Moscow, Soviet Union	35th	2:23:21
1982	Rome City Marathon	Rome, Italy	4th	2:12:38 [1]
1983	World Championships	Helsinki, Finland	13th	2:11:47
1984	Olympic Games	Los Angeles, United States	43rd	2:22:38

• Marco Marchei at World Athletics
• Marco Marchei at Olympics.com
• Marco Marchei at Olympedia