I've compiled the following list of schools in the United States and Canada that have graduate programs in astronomy. The list is taken from the AIP Directory of Physics and Astronomy Graduate Programs and The Petersen Guide. Clicking on the name will connect you to the school's home page . . . . at least where I could find a link (some links are not yet working). I hope this will help you select the school right for you to apply to.
Please Note: Despite considerable effort, links seems to change faster than they can be checked. I apologize for dead ones.