Steven ("Steve") Micael Plasencia (born October 28, 1956 in Minneapolis, Minnesota) is a former American long-distance runner. Plasencia competed in the 10,000 metres at the 1988 Summer Olympics and the 1992 Summer Olympics. In the closest 1-2 finish in the race's history, Plasencia edged out Keith Brantly by one second to win the 1992 California International Marathon (2:14:14). His 14:02.86 5000 metres at the Drake Relays at the age of 40 was the American Masters record until 2014 when it was broken by Bernard Lagat.
Plasencia is currently the head cross-country and track and field coach at the University of Minnesota where he has won three Indoor Big Ten Track and Field Championships (2009, 2010, 2011) and two Outdoor Big Ten Track and Field Championships (2009, 2010) .
- All results regarding marathon, unless stated otherwise
|Representing the United States|
|1992||California International Marathon||California State Capitol, United States||1st||2:14:14|
|1995||World Championships||Gothenburg, Sweden||10th||2:16:56|
Washington, July 25, 1990)
- Marathon - 2:12.51
- 2 time Olympian
- "Archived copy". Archived from the original on January 16, 2009. Retrieved May 21, 2009.