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ISO 3166-2:TW is the entry for Taiwan (Republic of China) in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. Due to the political status of Taiwan in the United Nations, the ISO 3166-1 full name is listed as Taiwan, Province of China.[1]

The definition of ISO 3166-2:TW includes the divisions located on Taiwan (Formosa), Penghu (the Pescadores), Kinmen, Matsu and their subsidiary islands. These areas are under the administration of the government of the Republic of China which resides in Taipei, different from the government of the People's Republic of China which was established in 1949.

Currently ISO 3166-2:TW lists 13 counties, 3 cities, and 6 special municipalities. Although constitutionally the counties and cities are part of the provinces of Taiwan and Fujian, the provincial government was largely streamlined in 1998, these 22 subdivisions are regarded as the principal subdivisions of Republic of China (Taiwan).

ISO 3166-2:TW has not been adopted by the Government of the Republic of China yet. Alternatively, the government uses the Code of Household Registration and Conscription Information System (HRCIS Code) to mark the divisions of Taiwan.


  • Each code consists of two parts, separated by a hyphen. The first part is TW, the ISO 3166-1 alpha-2 code of Taiwan. The second part is three letters.
  • The divisions in the list are categorized in three types:
    • Cities: Romanized as shih () and formerly called "municipalities" in ISO 3166-2. The divisions carry City () in their official names.
    • Counties: Romanized as hsien () and formerly called "districts" in ISO 3166-2. The divisions carry County () in their official names.
    • Special municipalities: Romanized as chih-hsia-shih (直轄市). The divisions also carry City () in their official names.
  • Taiwan is currently assigned the ISO 3166-2 code CN-TW under ISO 3166-2:CN, as China solely claims it as a province of China.

Current codesEdit

Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA).

Code Subdivision name (zh)
(conventional names)
Subdivision category
TW-CHA Changhua county
TW-CYI Chiayi city
TW-CYQ Chiayi county
TW-HSZ Hsinchu city
TW-HSQ Hsinchu county
TW-HUA Hualien county
TW-KHH Kaohsiung special municipality
TW-KEE Keelung city
TW-KIN Kinmen county
TW-LIE Lienchiang county
TW-MIA Miaoli county
TW-NAN Nantou county
TW-NWT New Taipei special municipality
TW-PEN Penghu county
TW-PIF Pingtung county
TW-TXG Taichung special municipality
TW-TNN Tainan special municipality
TW-TPE Taipei special municipality
TW-TTT Taitung county
TW-TAO Taoyuan special municipality
TW-ILA Yilan county
TW-YUN Yunlin county


The following changes to the entry have been announced by the ISO 3166/MA since the first publication of ISO 3166-2 in 1998. ISO stopped issuing newsletters in 2013.

Newsletter/OBP Date issued Description of change in newsletter Code/Subdivision change
Newsletter I-4 2002-12-10 Error correction: Duplicate use of six code elements corrected. Subdivision categories in header re-sorted

Codes: (to correct duplicate use)

  • Chiayi (district): TW-CYITW-CYQ
  • Hsinchu (district): TW-HSZTW-HSQ
  • Kaohsiung (district): TW-KHHTW-KHQ
  • Taichung (district): TW-TXGTW-TXQ
  • Tainan (district): TW-TNNTW-TNQ
  • Taipei (district): TW-TPETW-TPQ
Online Browsing
Platform (OBP)
2015-11-27 Addition of category name for special municipality in zho; change of spelling of TW-ILA; deletion of districts TW-KHQ, TW-TNQ, TW-TPQ, TW-TXQ; addition of districts TW-KIN,TW-LIE and special municipality TW-NWT; change of subdivision category from municipalities to special municipalities for TW-TXG, TW-TNN; change of subdivision category from district to special municipality for TW-TAO; update List Source.

Subdivision added:

Subdivision deleted:

Subdivision category changed:

  • Taoyuan (TW-TAO): district → special municipality
  • Tainan (TW-TNN): municipality → special municipality
  • Taichung (TW-TXG): municipality → special municipality
2016-11-15 Change of subdivision category from municipality to city and district to county; update List Source
  • (each) district → county
  • (each) municipality → city

See alsoEdit


  1. ^ "Country names and code elements". ISO.

External linksEdit