For research opportunities, is University of Illinois Urbana-Champaign or University of Copenhagen better?

If your main goal is undergraduate research access, UIUC is usually the easier place to plug in early and often. It is a very large U.S. research university with extensive lab activity across engineering, computer science, physics, agriculture, psychology, and many other fields, and undergraduates commonly join faculty labs through direct outreach, course connections, or structured campus programs. The scale matters here: there are simply a lot of departments, a lot of faculty, and a strong culture of undergrads working in research groups.

UIUC tends to fit the student who wants a campus where research is highly visible and built into the undergraduate experience, especially in STEM. If you like the idea of emailing professors, joining a lab during the school year, maybe shifting between projects, and being surrounded by graduate students and major research infrastructure, UIUC has a real advantage. In practice, students often find opportunities through departmental newsletters, honors programs, research fairs, and professors teaching their classes.

The University of Copenhagen makes more sense for a student drawn to a highly respected European research environment, especially in areas like life sciences, health, sustainability, and basic science. It is an excellent research university, but the undergraduate structure can feel less centered on early, broad-based research participation than at a big U.S. campus. Research opportunities certainly exist, but they may be more dependent on your specific program, your initiative, and how research is organized within your faculty or department.

Copenhagen can be a strong choice if you are comfortable navigating a more independent academic culture and do not need research access to be as formalized or heavily advertised to first- and second-year students. For a student comparing research opportunity in the broadest sense, especially ease of getting involved as an undergrad, UIUC has the clearer edge. Copenhagen is still a serious research institution, but UIUC is more likely to feel immediately research-active at the undergraduate level.