CT’s health system performs better than 45 other states according to the 2015 Commonwealth Fund State Scorecard on State Health System Performance. We improved on eight metrics, but lost ground on four. States are ranked on 42 indicators such as avoidable hospitalizations, health risk behaviors, childhood vaccinations, and hospital patients discharged with information to help recover at home. CT did well on all but one distinct dimension of health system performance. CT was tied for fifth in Access and Affordability of Care, ninth in Prevention and Treatment, tied for second for Healthy Lives, and third in Health Equity. However CT ranked far lower at 28th among states on Avoidable Hospital Use and Cost. The rankings offer Connecticut guidance to improve health system performance especially around avoidable hospitalizations.