ISO 3166-2:TW

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ISO 3166-2:TW is the entry for Taiwan 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 Taiwan, Province of China.[1]

The definition of ISO 3166-2:TW includes the divisions located in Taiwan (Formosa), Penghu (the Pescadores), and their subsidiary islands. Politically, these areas are governed by the Republic of China, including Taiwan Province and several special municipalities. Currently ISO 3166-2:TW lists 16 counties, 5 Provincial cities, and 2 special municipalities. However, after the administrative divisions reformed in December 2010, the divisions in the defined area became 12 counties, 3 Provincial cities, and 5 special municipalities. The change still not reflected on ISO 3166-2:TW.

Note that the districts (counties) and the municipalities (provincial cities) are part of the Taiwan Province of the Republic of China, while the special municipalities are not part of the province. Since the streamlining of the Taiwan Province in 1998, these subdivisions are regarded as the principal subdivisions 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:
  1. Districts: Romanized as hsien, translated to counties (縣). The divisions carry County (縣) in their official name.
  2. Municipalities: Romanized as shih, translated to provincial cities (市). The divisions carry City (市) in their official name.
  3. Special municipalities: Translated to special municipalities (直轄市). The divisions also carry City (市) in their official name.

Current codes[edit]

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

The following subdivision changes have taken effect since 2010 but are not listed in ISO 3166-2:

Code Subdivision name Subdivision category Official name
TW-CHA Changhua district Changhua County
TW-CYQ Chiayi district Chiayi County
TW-HSQ Hsinchu district Hsinchu County
TW-HUA Hualien district Hualien County
TW-ILA Ilan district Yilan County
TW-KHQ Kaohsiung district Kaohsiung County1
TW-MIA Miaoli district Miaoli County
TW-NAN Nantou district Nantou County
TW-PEN Penghu district Penghu County
TW-PIF Pingtung district Pingtung County
TW-TXQ Taichung district Taichung County3
TW-TNQ Tainan district Tainan County4
TW-TPQ Taipei district Taipei County2
TW-TTT Taitung district Taitung County
TW-TAO Taoyuan district Taoyuan County
TW-YUN Yunlin district Yunlin County
TW-CYI Chiayi municipality Chiayi City
TW-HSZ Hsinchu municipality Hsinchu City
TW-KEE Keelung municipality Keelung City
TW-TXG Taichung municipality Taichung City3
TW-TNN Tainan municipality Tainan City4
TW-KHH Kaohsiung special municipality Kaohsiung City1
TW-TPE Taipei special municipality Taipei City

The marked divisions were disestablished on December 25, 2010, and the following special municipalities were founded. Their codes are not yet assigned.

No. Code Subdivision name Subdivision category Official name Notes
1 TW-??? Kaohsiung special municipality Kaohsiung City Merged from Kaohsiung County (TW-KHQ) and Kaohsiung City (TW-KHH)
2 TW-??? New Taipei special municipality New Taipei City Changed from Taipei County (TW-TPQ)
3 TW-??? Taichung special municipality Taichung City Merged from Taichung County (TW-TXQ) and Taichung City (TW-TXG)
4 TW-??? Tainan special municipality Tainan City Merged from Tainan County (TW-TNN) and Tainan City (TW-TNQ)

Other territories of the Republic of China[edit]

Note that ISO 3166-2:TW does not contain Kinmen County and Lienchiang County - which also under the jurisdiction of the Fukien Province of the Republic of China - because they are not considered as a part of Taiwan historically.[citation needed]


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

Newsletter 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

See also[edit]


External links[edit]