Dong (administrative division)

A dong or neighborhood is a submunicipal level administrative unit of a city and of those cities which are not divided into wards throughout Korea. The unit is often translated as neighborhood and has been used in both administrative divisions of North Korea and South Korea.
In South Korea.
A "dong" is the smallest level of urban-area division to have its own office and staff in South Korea. There are two types of "dong": legal-status neighborhood () and administrative neighborhood ().
For land property and (old) address, legal-status neighborhood is mainly used. Unlike what the name indicates, they are not defined by any written law. Instead, most of names are came from customary law, which indicates historical names. Administrative neighborhood, however, is defined by local governments to make an office (community center). Community centers provide some administrative services such as residential/birth registration or death notification, to relief service pressure of local government. Also, electoral districts are based on administrative neighborhood.
In usual cases, an administrative neighborhood is set by population of the area to match demands for the civil services. Because legal-status neighborhood uses historical name, recently developed (populated) area can be grouped as a single legal-status neighborhood. In such places, it can be divided into several administrative neighborhoods. Sillim-dong is a typical example for this case. For the same reason, there are some inverse cases, i.e. a single administrative neighborhood holding multiple legal-status neighborhoods. Such cases contain undeveloped suburban area, or recently declining area.
The primary division of a "dong" is the "tong" (), but divisions at this level and below are used rarely in daily life. Cases using "tong" contain school districts or military services. Some "dong" are subdivided into "ga" (), which are not a separate level of government but only exist for use in addresses. Many major thoroughfares in Seoul, Suwon, and other cities are also subdivided into "ga".