Intramural sports or intramurals are recreational sports organized within a particular institution, usually an educational institution, or a set geographic area. The term, which is chiefly North American, derives from the Latin words intra muros meaning "within walls", and was used to describe sports matches and contests that took place among teams from "within the walls" of an institution or area. The term dates to the 1840s. It is contrasted with extramural, varsity or intercollegiate sports, which are played between teams from different educational institutions. The word intermural, which also correctly means "between institutions", is a common error for "intramural".
The Ohio State University and the University of Michigan created the first intramural sports departments in 1913. Elmer Mitchell, a graduate student at the time, was named the first Director of Intramural Sports at the University of Michigan in 1919 and the first recreational sports facility in the country opened at the University of Michigan. Mitchell is considered the "father of intramural sports" and taught a class in intramural sports taken by William Wasson, founder of the National Intramural Association (NIA), the forerunner to the National Intramural and Recreational Sports Association (NIRSA).
Today, "intramural" tournaments are still organized within a specific community or municipal area, between teams of equivalent age or athletic ability. For example, intramural sports programs are often organized on college campuses to promote competition and fun among the students.
For most schools and campuses, intramural sports are used to promote wellness and allow students who do not compete on a national (NCAA) level an opportunity to be active.
Intramural sports in the United States
The National Intramural Recreational Sports Association (NIRSA), a professional organization based in Corvallis, Oregon, provides a network of more than 4,000 highly trained professionals, students and Associate Members in the recreational sports field throughout the United States, Canada and other countries. In most of the world outside North America, sports scholarships and college sports on the North American model do not exist so the distinction between college and intramural sports has no relevance and is not made.
Intramural sports in Canada
The Canadian Intramural Recreation Association (CIRA) organized intramurals within Canada from 1976-2002. CIRA Ontario has been the major intramural organization in the Canadian province of Ontario since 1969. CIRA Ontario is an incorporated, non-profit organization whose mission is to encourage, promote, and develop active living, healthy lifestyles and personal growth through intramural and recreation programs within the education and recreation communities. They fulfill their mandate through resources, workshops, conferences, newsletters, awards, and other means. 
- intra muros - Definition from the Merriam-Webster Online Dictionary
- "Defination of 'intramural'". dictionary.com. Retrieved 7 February 2014.
- "Defination of 'intramural'". Merriam-Webster Online Dictionary. Retrieved 7 February 2014.
- Common Errors in English Usage, Paul Brians
- University of Michigan
- Department of Recreational Sports University of Michigan, retrieved May 24, 2010
- Dr. William N. Wasson, NIRSA, retrieved May 25, 2010
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- CIRA Ontario
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- D. Wade & S. Mayhew Everything I know about Intramurals, I learned from Gary Cahen (1st edition, Iota Press, 2005.)