Theregions ofTaiwan are based on historical administrative divisions. However, most of the definitions are not precise.
The most widely used definition is from theCouncil for Economic Planning and Development (經濟建設委員會),Executive Yuan. This division into four regions (tetrachotomy) scheme corresponds to the prefecturesunder Qing dynasty rule.
| No. | 1 | 2 | 3 | 4 | – |
|---|---|---|---|---|---|
| Name | Northern Taiwan | Central Taiwan | Southern Taiwan | Eastern Taiwan | Outlying Islands |
| 北臺灣 | 中臺灣 | 南臺灣 | 東臺灣 | 外島 | |
| Province | Taiwan & 6Special municipalities | Fujian Kaohsiung City | |||
| Map | |||||
| Present divisions | Taipei New Taipei Keelung Taoyuan HsinchuCity/County Yilan | Miaoli Taichung Changhua Nantou Yunlin | ChiayiCity/County Tainan Kaohsiung Pingtung Penghu | Hualien Taitung | Kinmen Matsu(Lienchiang) South China Sea Islands (governed byCijin of Kaohsiung) |
| Historical Prefectures | Taipeh (臺北府) | Taiwan (臺灣府) | Tainan (臺南府) | Taitung (臺東直隸州) | |
The scheme of division into five regions (pentachotomy) is a fusion of the tetrachotomy and hexachotomy schemes. Although no specific names are given in each division, it is the most commonly used scheme among the highest divisions of thecentral government. This scheme is used by the Joint Service Centers (JSC,區域聯合服務中心) underExecutive Yuan (行政院) and the jurisdiction of High Court Branches (高等法院分院) underJudicial Yuan (司法院).[1]
| No. | Present divisions | Joint Service Center | High Court Branch |
|---|---|---|---|
| 1 | Taipei,New Taipei,Keelung,Taoyuan,HsinchuCity/County,Yilan | (Headquarter) | Taiwan HC (Headquarter) |
| 2 | Miaoli,Taichung,Changhua,Nantou | Central Taiwan JSC | Taiwan HC Taichung BC |
| 3 | Yunlin,ChiayiCity/County,Tainan | Yunlin-Chiayi-Tainan JSC | Taiwan HC Tainan BC |
| 4 | Kaohsiung,Pingtung,Penghu | Southern Taiwan JSC | Taiwan HC Kaohsiung BC |
| 5 | Hualien,Taitung | Eastern Taiwan JSC | Taiwan HC Hualien BC |
| – | Kinmen,Matsu(Lienchiang) | Kinmen-Matsu JSC | Fuchien HC Kinmen BC |

The division into six regions (hexachotomy) scheme corresponds to the prefecturesunder Japanese rule. This scheme was used for national electoral districts in thelegislative elections in1972,1975,1980,1983, and1986. The discussion of this scheme became popular after theelections of five new municipalities in 2010.[2]
| No. | Name | Present divisions | Historical Prefectures | ||
|---|---|---|---|---|---|
| 1 | Pei–Pei–Kee–(Yi) | 北北基(宜) | Taipei,New Taipei,Keelung, (Yilan) | Taihoku | 臺北州 |
| 2 | Tao-Chu-Miao | 桃竹苗 | Taoyuan,HsinchuCity/County,Miaoli | Shinchiku | 新竹州 |
| 3 | Chung–Chang–Tou | 中彰投 | Taichung,Changhua,Nantou | Taichū | 臺中州 |
| 4 | Yun–Chia–Nan | 雲嘉南 | Yunlin,ChiayiCity/County,Tainan | Tainan | 臺南州 |
| 5 | Kao–Ping(–Peng) | 高屏(澎) | Kaohsiung,Pingtung, (Penghu) | Takao,Hōko | 高雄州、澎湖廳 |
| 6 | (Yi–)Hua–Tung | (宜)花東 | (Yilan),Hualien,Taitung | Karenkō,Taitō | 花蓮港廳、臺東廳 |
| – | (Peng–)Kin–Ma | (澎)金馬 | (Penghu),Kinmen,Matsu(Lienchiang) | None | |