Projected growth in demand for clinical geropsychologists will require expanding the number of qualified geropsychology mentors at all stages of professional development. This special section provides information on mentoring from expert geropsychology mentors who offer their perspectives, and summarize relevant research, on mentoring graduate students, interns and postdoctoral fellows, junior faculty and members of special populations. The present paper provides an introduction to the special section by establishing the need for increased mentoring within clinical geropsychology, presenting results of a survey of mentoring practices and needs, and discussing ways in which the field is responding to the challenge.