This page contains links to 185 psychology Ph.D. programs rank-ordered in quality according to a 1995 study conducted by the National Research Council (with "quality scores" taken from a summary of the NRC report published by the APS Observer in January, 1996).
See the Canadian Psychological Association Graduate Guide for information on graduate study in Canada (the CPA Guide does not rank Canadian programs, but it offers very useful information along with links to individual programs). Finally, to reach U.S. schools that are not on this list, you might try using the U.S. University Locator. The Association for Psychological Science also maintains a List of Psychology Departments.
Note to Students: The rankings below should be considered no more than a rough approximation. You would be well advised to consult as many faculty members as possible for feedback on your top school choices before applying to graduate school. Admission to graduate school is competitive, so apply to as many schools as possible; have your friends, family, and academic advisors look over your application materials; and if you receive letters of rejection, don't lose your sense of humor!