<p>I’m assuming you are asking about public colleges, because most privates have a more balanced number of IS & OOS students and they do not care if you are IS or OOS for admissions decisions.</p>
<p>A public college will usually have many more IS than OOS students, because more apply. That said, it is often more difficult to get in as an OOS student, because one of the main mandates of a public university is to serve the students of that state. Often states have agreements between their CCs and 4-yr colleges, facilitating transfers. The UCs are a good example, although they are becoming more amenable to OOS students as long as they are willing to pay full OOS tuition w/o FA.</p>