Two hours of daily social media linked to loneliness in college students - heaviest users are 38% more likely to feel isolated

54% of college students report loneliness - and social media time is part of the pattern

More than half of American college students feel lonely. That figure, from a national survey of nearly 65,000 students at over 120 institutions, is consistent with other recent research on young adult wellbeing in the United States. What makes the new study notable is its granular look at how social media use relates to that loneliness - and the dose-response relationship it documents between hours spent online and the likelihood of feeling isolated.

The research, published in the Journal of American College Health and led by Dr. Madelyn Hill of Ohio University - who conducted the study while completing her doctoral work at the University of Cincinnati in spring 2025 - is among the largest examinations of social media use and loneliness in this age group.

The numbers behind the headline

Loneliness was measured by asking students how often they felt left out, lacked companionship, or felt isolated - a standard validated scale used across multiple prior studies. Social media usage was self-reported in terms of typical weekly hours. The association between the two variables scaled with usage:

Students using social media for 16 to 20 hours per week were 19% more likely to report loneliness than students who did not use social media at all. Those using it for 21 to 25 hours per week were 23% more likely to feel lonely; 26 to 30 hours, 34% more likely. The heaviest users - those spending at least 30 hours per week on social platforms - were 38% more likely to report loneliness. About 13% of the survey's respondents fell into the highest usage category.

The study also produced findings about other factors associated with loneliness. Female and Black students were particularly likely to report feeling lonely. Students in hybrid courses were less lonely than those studying entirely in person. Members of fraternities and sororities were among the least lonely. Students living at home reported higher loneliness than those with on-campus housing.

The causality problem

The study's authors acknowledge explicitly that they cannot establish which way the causal arrow runs - and they suspect it runs in both directions simultaneously. Some students who spend extensive time on social media may become lonelier as a result. Others who are already lonely may turn to social media as a way of finding connection, making high usage a consequence of loneliness rather than its cause.

The authors also note that students may have underestimated the time they spend on platforms, a well-documented tendency in self-reported media use research.

"We know that people who are lonely are more likely to become depressed. We also know that those who are lonely are more likely to die early," said Dr. Hill. "Young adulthood is a time of many changes, from leaving home for the first time, to starting college and forming new friendships, and it is vital that colleges and universities do all they can to help their students forge connections with others."

What institutions can actually do

Senior author Dr. Ashley Merianos of the University of Cincinnati drew the practical conclusion: "These results underscore how widespread loneliness is among college students and highlight that excessive social media use may be replacing the meaningful interactions that protect their mental health. A key public health strategy to combat this loneliness epidemic is to strengthen social connections and help students build supportive relationships with their peers offline."

The specific institutional recommendations the study offers: educate students about the potential negative effects of excessive social media use, encourage time limits, and actively promote on-campus social events and organizations. Whether these interventions are sufficient to shift the loneliness numbers is uncertain - the conditions that drive loneliness among college students are deeper than social media habits alone, involving housing arrangements, course formats, financial stress, and the often-difficult transition to adult social life.

The study's national scale gives it credibility as a snapshot of where young adults stand on this dimension of mental health. Nearly 65,000 students across more than 120 institutions is a sample large enough to reveal real patterns. The consistency of the dose-response relationship - higher at each step up the usage ladder - is the finding that most firmly establishes that the two variables are genuinely related, even if the mechanism remains to be established.