Can you apply to a college after they reject you?

No, you cannot apply to a college *after* they have formally rejected your application for a particular admission cycle. Once they've made a decision, that decision generally stands for that specific application period.

However, you *can* apply again in a future application cycle (e.g., for the following fall semester). You would need to submit a completely new application, including updated transcripts, letters of recommendation, and essays. You'd also need to address any reasons for the previous rejection if you feel you can demonstrate significant improvement.