The Republic of China

Republic of China

The Republic of China , commonly known as Taiwan , is a unitary sovereign state located in East Asia. Originally based in mainland China, the Republic of China currently governs the island of Taiwan , which forms over 99% of its current territory, as well as Penghu, Kinmen, Matsu and other minor...

 government uses postal codes of three + two digits in Taiwan

Taiwan

Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...

. There are 368 sets of three-digit codes for rural townships, urban townships, county-controlled cities, districts (Hsinchu City and Chiayi City have districts coded 300 and 600 respectively without three-digit subdivisions), and the uninhabited island groups of Pratas Islands

Pratas Islands

The Pratas Islands or Dongsha Islands consists of three islands forming from an atoll located in northeastern South China Sea, southeast of Hong Kong. The islands are governed by the Republic of China . The People's Republic of China claims sovereignty over these islands along with all other...

, Spratly Islands

Spratly Islands

The Spratly Islands are a group of more than 750 reefs, islets, atolls, cays and islands in the South China Sea. The archipelago lies off the coasts of the Philippines and Malaysia , about one third of the way from there to southern Vietnam. They comprise less than four square kilometers of land...

, and Diaoyutai Islands (claimed by the ROC, currently controlled by Japan). Omitting the supplementary two digits is ordinarily acceptable, but a five-digit code will speed up the mail.

The first digit is for a large postal zone, as follows:

First digit	Cities	Counties	Subsidiary islands
0	Unused
1	Taipei City
2	New Taipei City, Keelung City	Yilan County, Lienchiang County (Matsu Islands) Matsu Islands The Matsu Islands are a minor archipelago of 19 islands and islets in the Taiwan Strait administered as Lienchiang County , Fujian Province of the Republic of China . Only a small area of what is historically Lienchiang County is under the control of the ROC...	Diaoyutai Islands
3	Hsinchu City	Hsinchu County Hsinchu County Hsinchu County is a county in north-western Taiwan. The population of the county is mainly Hakka; there is a Taiwanese aboriginal minority in the southeastern part of the county. Zhubei is the capital of Hsinchu, where the government office and county office is located... , Taoyuan County Taoyuan County "Taoyuan County" may refer to:*Taoyuan County, Taiwan, a county in northern Taiwan Province, *Taoyuan County, Hunan, a county in Hunan Province,... , Miaoli County Miaoli County Miaoli County is a county in western Taiwan. The name Miaoli was coined using two Hakka words, cat and raccoon dog , which phonetically approximate Pali , a community of Taokas people...
4	Taichung City
5		Changhua County Changhua County Changhua County is the smallest county in Taiwan located on the westside of Taiwan. It is officially governed as a county of the Republic of China .-Urban townships:# Beidou Township # Erlin Township... , Nantou County Nantou County Nantou County is the second largest county of Taiwan. It is also the only landlocked county in Taiwan. Its name derives from the Hoanya Taiwanese aboriginal word Ramtau. Nantou County is officially administered as a county of Taiwan....
6	Chiayi City	Chiayi County Chiayi County Chiayi County is a county in southwestern Taiwan surrounding but not including Chiayi City. Its historical name in Taiwanese Hokkien derives from Tsirosen in the Formosan languages... , Yunlin County Yunlin County Yunlin County is a county in the western part of Taiwan, the Republic of China. Yunlin is located to the right of the Taiwan Strait, the east of Nantou County and sharing a border with Changhua County divided by the Zhuoshui River. Yunlin is one of the counties of Taiwan that is part of the Chianan...
7	Tainan City
8	Kaohsiung City	Penghu County, Kinmen County	Pratas Islands Pratas Islands The Pratas Islands or Dongsha Islands consists of three islands forming from an atoll located in northeastern South China Sea, southeast of Hong Kong. The islands are governed by the Republic of China . The People's Republic of China claims sovereignty over these islands along with all other... , Spratly Islands Spratly Islands The Spratly Islands are a group of more than 750 reefs, islets, atolls, cays and islands in the South China Sea. The archipelago lies off the coasts of the Philippines and Malaysia , about one third of the way from there to southern Vietnam. They comprise less than four square kilometers of land...
9		Pingtung County Pingtung County Pingtung County is a county in Southern Taiwan. Pingtung County is officially administered as a county of the Republic of China . The oldest national park in Taiwan, Kenting National Park, was established in Pingtung County in 1984... , Taitung County Taitung County Taitung County is a county in eastern Taiwan. The name means "Eastern Taiwan". Taitung County is also known as 後山 by many of the locals, meaning behind the mountains or the back mountains. Taitung is officially administered as a county of Taiwan, Republic of China.Taitung runs along the south east... , Hualien County Hualien County Hualien County is the largest county in Taiwan and is located on the mountainous eastern coast of Taiwan. It contains the island's largest port. It is the starting point of the Hualien-Taitung Line and the terminal point of North-Link Line of TRA...