Harvard–Yale sister colleges

Harvard College's residential houses and Yale University's residential colleges have established sisterly relationships, much like the Oxbridge sister colleges.[1] The living quarters were made possible by philanthropist Edward S. Harkness. These twinnings are rarely invoked nowadays, except on the weekend of The Game when some houses/colleges find accommodation for visiting rival fans.

In 2005, additional affiliations between Harvard's freshman dormitories, which are not affiliated with Harvard's residential houses and Yale's residential colleges were established in order to accommodate Harvard freshmen at Yale for the 2005 Game. They are not permanent affiliations and may change in the future. They are listed below in parentheses.

Note: Harvard has 13 houses and Yale has 12 colleges, not including the two new colleges, Benjamin Franklin and Pauli Murray. Dudley house has only a handful of undergraduates, and is doubled-up with Pforzheimer as sisters of Silliman, the largest of the Yale colleges.

Although some of these houses and colleges have established links to various Oxford and Cambridge colleges, the ties are not transitive so it is impossible to make a four–column chart.[2]