Scientists are virtually certain that climate change will lead to sea-level rise, more extreme storms, heat waves, wildfires, changing weather patterns, and the spread of disease. Reducing greenhouse gas emissions is necessary, but not sufficient. Global, national, and subnational adaptation measures to reduce climate harm are essential. Because the consequences of increased disasters, long-term impacts on habitability, and public health threats will not fall equally around the globe or within the United States, equity considerations should play a vital role in emerging U.S. adaptation initiatives. Seven principles for achieving equitable adaptation are suggested, principles designed to improve substantive outcomes, ensure meaningful participation, and address underlying socioeconomic conditions.