Harvard–Yale sister colleges
's residential houses and Yale University's residential colleges have established sisterly relationships, much like the Oxbridge sister colleges. 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.
| Harvard | Yale |
| Adams House | Saybrook College |
| Cabot House | Trumbull College |
| Currier House | Ezra Stiles College |
| Dudley House Pforzheimer House | Silliman College* |
| Dunster House | Berkeley College |
| Eliot House | Jonathan Edwards College |
| Kirkland House | Hopper College |
| Mather House | Morse College |
| Leverett House | Timothy Dwight College |
| Lowell House | Pierson College |
| Quincy House | Branford College |
| Winthrop House | Davenport College |
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.