This systematic review summarizes existing evidence regarding the efficacy, safety, and abuse/misuse potential of opioids as treatment for chronic non-cancer pain (CP) in older adults. Multiple databases were searched to identify relevant studies published in English (1/1/80-7/1/09) with a mean study population age of 60 years or above. Forty-three articles were identified and retained for review. The weighted mean subject age was 64.1 years (mean age range: 60-73). Studies enrolled patients with osteoarthritis (70%), neuropathic pain (13%), or other pain-producing disorders (17%). The mean duration of treatment studies (n=40) was 4 weeks (range = 1.5–156 weeks), and only 5 (12%) lasted longer than 12 weeks. In meta-analyses, effect sizes were −0.557 (p<0.001) for pain reduction, −0.432 (p<0.001) for physical disability reduction, and 0.859 (p=0.309) for improved sleep. The effect size for the SF-36 physical component score was 0.191 (p = 0.171) and −0.220 (p =0.036) for the mental component score. Adults ages 65 and above (vs. less than 65) were equally likely to benefit from treatment. Common adverse events included constipation (median frequency of occurrence = 30%), nausea (28%), dizziness (22%), and prompted opioid discontinuation in 25% of cases. Abuse/misuse behaviors were negatively associated with advancing age. Among older adults with CP and no significant comorbidity, short-term use of opioids is associated with reductions in pain intensity, improved physical functioning, but decreased mental health functioning. The long-term safety, efficacy, and abuse potential of this treatment practice in diverse populations of older persons remain to be determined.