Tree squirrels are commonly found on the campuses of colleges and universities in North America, particularly in the United States. Though often cited as a U.S. phenomenon and researched in regard to North American contexts, European and Asian college campuses have been known to be inhabited by squirrels as well.
Student response to such populations is mixed, with some amused by the squirrels and considering them a core and positive aspect of campus culture, and other students considering the squirrels to be aggressive and a nuisance.