The 13th edition of the ACEEE State Energy Efficiency Scorecard is a progress report on state policies and programs that save energy while producing environmental and economic benefits. We use data vetted by state energy officials to rank states in six categories—utility programs, transportation, building energy codes, combined heat and power, state initiatives, and appliance standards. Top finishers in this year’s Scorecard include Massachusetts, California, Rhode Island, Vermont, and New York. The most improved state is Maryland; other significantly improved states include Hawaii and New Jersey. The Scorecard shows that energy efficiency is a key resource nationwide, with utilities spending approximately $8 billion in 2018 for efficiency programs and saving 27.1 million MWh of electricity.