能源之星（英语：Energy Star），是针对节约能源的消费产品之国际标准及计划。这项计划在90年代于美国发起。

能源之星计划于1992年由美国环保署所启动，目的是降低能源消耗及减少发电厂所排放的温室效应气体。此计划并不具强迫性，自发配合此计划的厂商可以在其合格产品上粘贴能源之星的标签。最早配合此计划的产品主要是电脑等信息电器，之后逐渐延伸到电机、办公室设备、照明、家电等等。后来还扩展到建筑的领域，美国环保署于1996年起积极推动能源之星建筑物计划，由环保署协助自愿参与业者评估其建筑物能源使用状况（包括照明、空调、办公室设备等）、规划该建筑物之能源效率改善行动计划以及后续追踪作业，所以在一些导入环保新概念的住家或工商大楼中也可发现能源之星的标志。

Energy Star (trademarked ENERGY STAR) is an international standard for energy efficient consumer products originated in the United States. It was created in 1992 by the Environmental Protection Agency and the Department of Energy. Since then, Australia, Canada, Japan, New Zealand, ******, and the European Union have adopted the program. Devices carrying the Energy Star service mark, such as computer products and peripherals, kitchen appliances, buildings and other products, generally use 20–30% less energy than required by federal standards. In the United States, the Energy Star label is also shown on EnergyGuide appliance label of qualifying products.