* Colleges typically offer undergraduate programs (Bachelor's degrees) and may or may not offer some graduate programs (Master's degrees). They tend to be smaller and more focused in their academic offerings.
* Universities offer a wider range of programs, including undergraduate, graduate (Master's and Doctoral degrees), and often professional degrees (like law, medicine, dentistry). They are generally larger institutions with more diverse research opportunities and a more complex organizational structure.
Essentially, all universities are colleges, but not all colleges are universities. A university is a more comprehensive institution. The distinction is often blurry, however, and many institutions call themselves "universities" even if their graduate programs are limited.