Could an ear infection cause dizziness?

Certainly can: An ear infection certainly can cause dizziness, though it is not the only possible cause. Dizziness, or vertigo, can occur from various conditions, so details about when it happens (at rest, right after getting up from sitting, with activity, etc.) can help make the diagnosis. I would definitely see a physician if you are having a vertigo or think you have an ear infection. Good luck to you!