A region of the United States covering the geographic southern United States, or roughly the area south of the 37th or 38th parallels, north latitude.

Not to be confused with the Bible Belt, the Sun Belt extends beyond the states traditionally associated with the deep south (Georgia, Alabama, Mississippi, Louisiana, Arkansas, Kentucky, Tennessee, and the Carolinas), and extends west through the warmer climes of the continental U.S. (Texas, New Mexico, Arizona, California, Florida, Colorado, Utah, Oklahoma, Nevada, extending as far north as Virginia).

The Sun Belt has seen substantial population growth in recent decades, fueled by milder winters, coupled with the availability and affordability of air conditioning. In addition, the latter half of the 20th century has seen a surge in retiring baby boomers migrating domestically, as well as the influx of immigrants, both legal and illegal, into this region.

One of the most densely populated areas for professional sports in the U.S., the college powerhouse SEC has existed there for over 75 years, with the population boom also adding to the creation of the eponymous Sun Belt Conference (est. 1976) and the currently higher profile Conference USA (est. 1995). All three conferences exist entirely within this region.

Solarpunk is a movement focused on a positive, ecological vision for a future where technology is used for human-centric and ecocentric purposes. It is a literary, artistic and aesthetic sub-genre and is also closely tied to eco-political activism. Solarpunk narratives have a distinctly positive and utopian foundation in contrast to the often dystopian visions found within other "punk" science fiction genres.