Simple living refers to practices that promote simplicity in one's lifestyle. Common practices of simple living include reducing the number of possessions one owns, depending less on technology and services, and spending less money. Not only is simple living focused on external changes such as minimalism through fewer commitments or possessions but it also connects to the human's mindset and set of beliefs. These practices can be seen throughout history, religion, art, and economics.

Adherents may choose simple living for a variety of personal reasons, such as spirituality, health, increase in quality time for family and friends, work–life balance, personal taste, financial sustainability, increase in philanthropy, frugality, environmental sustainability, or reducing stress. Simple living can also be a reaction to materialism and conspicuous consumption. Some cite sociopolitical goals aligned with environmentalist, anti-consumerist or anti-war movements, including conservation, degrowth, deep ecology, and tax resistance.