The current system used in South Korea is similar to that used by most countries around the world.^[3]

Street names edit

Korean streets have names typically ending in -daero (대로, 大路, Blvd.), -ro (로, 路, Rd.) or -gil (길, 街, St.) and they are distinguished by width: -daero (over 8 lanes), -ro (2~7 lanes) and -gil (others).

Some streets, mainly -daero and -ro, may be named after a feature in the area such as Daehak-ro (대학로, University Street) near a university, or after the neighborhood (dong) in which they lie such as Hyehwa-ro (혜화로, Hyehwa Street) which lies in Hyehwa-dong. Street names may be unique, or, in a convention which may seem confusing to foreigners, the same name can be re-used for several streets in the same area, with each street having a unique number.

Other streets, mainly -gil, may be named after the street name it diverges from with a systematic number. There are three different types of numbering rules: basic numbering, serial numbering, and other numbering. The purpose of numbering streets is to make street names easier to predict position of it so address users find their destination streets or buildings easily on the maps or the streets.

First, by basic numbering, which is used in most of Gyeonggi Province, a number is assigned to -gil diverging from -daero or -ro based on the basic number of the position diverging from -daero or -ro. Since the basic number increases by 2 every 20 meters, the basic number multiplied by 10 meters comes to the distance from the start point of the street to the current position. For example, Nongol-ro 10beon-gil (논골로10번길) indicates that the street diverges from Nongol-ro (논골로) and the diverging position is about 100 meters away from the start point of Nongol-ro. Since 10 is an even number, the street is on the right side of Nongol-ro. Note that basic numbered street names have beon-gil (번길) after their numbers, which indicates basic number.

Second, by serial numbering, which is used in Seoul, a serial number is assigned to -gil diverging from -daero or -ro, based on -daero or -ro number order. For example, if a street is the first one among streets diverging from Daehak-ro, it becomes Daehak-ro 1-gil (대학로1길). If a street is fourth among streets diverging from Daehak-ro, it becomes Daehak-ro 4-gil (대학로4길). Since 4 is even number, the street towards right side of Daehak-ro. Note that serial numbered street names do not have beon after their numbers, which indicates serial number.

Third, by other numbering, a serial number is assigned to -ro or -gil reflecting local characteristics.

Streets diverging from -gil are named after -gil with the diverging -gil with the additional number in Korean alphabet: ga (가), na (나), da (다), ra (라), ma (마) ... For example, the third diverging street of Daehak-ro 4-gil (대학로4길) would be Daehak-ro 4da-gil (대학로4다길). This secondary diverging numbering is applied to all of the numbering rules.

Building number edit

Building number is based on basic number, a virtual number that increases by 2 every 20 meters along a street with odd numbers on the left side and even numbers on the right side, as in most European countries. The building number is assigned to the basic number of a position of the main gate adjacent to the street. For example, if a building has three entrances and the main one is adjacent to Sejong-ro 2-gil, and its position is about 30m away from the start point of the left side of Sejong-ro 2-gil, the building number would be 3, and the road name address of the building will be 3, Sejong-ro 2-gil (세종로2길 3).

Hyphenated building numbers indicate that the house or building is on a street or alley that is too small or too short to receive a name of its own. Instead all buildings on this street or alley (or network of small alleys) share the same building number, followed by a hyphen, followed by a unique number afterwards. For example, if a network of small alleys branched off from basic number 12, then the buildings in that network of alleys would have addresses such as 12-1, 12-2, 12-3, 12-4 etc. Hyphenated building numbers also are used, in the case of several buildings in one basic interval (see 11, 11-1 and 11-2.)

An address written using this street address is similar to the previous system when it is written in Korean in that the largest entity is written first, and the recipient is written last. The district (gu) is generally included before the street name, and the neighborhood, city block, and building number (within the city block) are not included.

Just as in the East Asian system, different administrative divisions may be listed before the street name to make the location clear (for example, the province and city). If problems may arise with the Road Name Address system due to its relative newness, the traditional address may be included in parentheses afterwards. For example, Korea Post gives its address as 서울특별시 종로구 종로 6 (서린동 154-1) (Seoul Special City, Jongno-gu, Jong-no 6 (Seorin-dong 154-1)).

Older land-lot number addressing system edit

A typical building in South Korea is described by the administrative divisions in which it lies. If the address is written in Korean, the largest division will be written first, followed by the smaller divisions, and finally the building and the recipient. If the recipient is in a multi-unit building, the floor and apartment or suite number may follow.

A typical building in Seoul, for example, belongs to Seoul Metropolitan City, a particular ward (gu, 구, 區), and a neighborhood (dong, 동, 洞) within that ward. (Neighborhood names that include numbers, such as Seocho 2-dong (서초2동) in the example below, indicate that the neighborhood was once part of a larger neighborhood that was divided for administrative purposes, possibly because the original neighborhood's population grew too large for a single neighborhood.) Each neighborhood is divided into city blocks (beonji, 번지, 番地), which can range from several dozen to several thousand per neighborhood. The building itself is given a building number (ho, 호, 戶) within the city block. (Usually, the words "번지" and "호" are not included in the written address; instead, only their numbers, separated by a hyphen, are written.) If the building has a name, then the city block and building numbers may in some cases be omitted, or the name may follow these numbers. After the building name or number, the floor (cheung, 층, 層) may be written, followed by the apartment or suite number (ho, 호, 號) and, finally, the recipient.

Below is a fictitious example of an address in Seoul. Note that the neighborhood, Seocho 2-dong, includes a number and was probably split from Seocho-dong. Also, the words "번지" and "호" are omitted, and only their numbers are written, separated by a hyphen. There is no line convention for addresses written in Korean, and the entire address may be written in one line on the envelope.

Other administrative divisions found in South Korean addresses are provinces, metropolitan cities, cities, counties, towns, townships, and villages. A Korean address written using the East Asian system uses between two and four of the aforementioned administrative divisions, in addition to the city block and building numbers, to describe the building's location (the example above uses three: special city, ward, and neighborhood).

When written in the Latin alphabet, the order is reversed so that the recipient is first and the city is last. Note that "gu" and "dong" are written in lower-case and connected with a hyphen, and that they are not translated into English. Also, SOUTH KOREA is added afterwards (always in English) for international mail. The recipient's family name may be capitalized to avoid ambiguity. It should also be noted that there is no official convention for South Korean addresses written in the Latin alphabet, and addresses are written in many ways. Mail carriers, however, are trained to interpret various formats, and should have little trouble delivering mail, especially if the postal code is included.

• Address (geography)
• building numbering
• Administrative divisions of South Korea