A subregion is a conceptual unit which derives from a larger region or continent and is usually based on location. Cardinal directions, such as south or southern, are commonly used to define a subregion.

The Statistics Division of the United Nations (UN) is in charge of the collection, processing, and dissemination of statistical information for the UN. In 1999, it developed a system of macro-geographical (continental) regions, subregions, and other selected economic groups to report advances towards achieving numerous millennial development goals worldwide. This geoscheme was devised for statistical purposes and is used for carrying out statistical analysis. The division's first publication was the book World's Women 2000: Trends and Statistics in 2000.

According to the UN, the assignment of countries or areas to specific groupings is for statistical convenience and does not imply any assumption regarding political or other affiliation of countries or territories.

The following is a non-exhaustive list of subregions, arranged alphabetically by region (i.e., by continent); in the UN geoscheme, higher-level, macro-geographical regions are arranged to the extent possible according to continents.