An affiliated school is an educational institution that operates independently, but also has a formal collaborative agreement with another, usually larger institution that may have some level of control or influence over its academic policies, standards or programs.
Examples of affiliated schools by area 
United States 
In the United States, Barnard College has an official affiliation with Columbia University. Barnard is legally and financially separate from Columbia but its students have access to the instruction and facilities of Columbia. Radcliffe College, another college of the Seven Sisters, was similarly affiliated with Harvard University until it was completely merged into Harvard in 1999.
In Canada, St. Thomas More College is the only federated college on the University of Saskatchewan campus in Saskatoon. The administration and financial details of St. Thomas More College are autonomous, and directly related to the Saskatchewan provincial government, but the academics are closely interrelated with the U of S.
The University of Regina has three federated colleges, which offer various degrees in conjunction with the university. The three federated colleges are Luther College, Campion College, and the First Nations University of Canada. All three colleges are located on the University of Regina's main campus, and all students of the federated colleges are also registered as students of the university.
The University of Alberta has one remaining affiliated college that offers degrees and classes in tandem with the university. St. Joseph's College provides not only Catholic-centred coursework, but also a chapel for the celebration of mass during the week. The college also maintains a very popular residence system for both men and women.
The University of Western Ontario has three affiliate colleges: Huron University College an Anglican College which predates the founding of the University, Brescia University College A Catholic women's college, and King's University College (University of Western Ontario) a co-educational Catholic college. King's University College is affiliated with St. Peter's Seminary (Diocese of London, Ontario) which also awards a limited number of University of Western Ontario degrees. In the past the University had affiliation agreements with other colleges, including Alma College (St. Thomas, Ontario), Assumption University (Windsor, Ontario) and Wilfrid Laurier University 
Other schools 
- University of Saskatchewan. "U of S / Course Calendar / St. Thomas More College". Archived from the original on 5 August 2007. Retrieved 2007-07-12.