| Conventional Long Name: | Chahar Province |
| Common Name: | Chahar |
| Nation: | Republic of China |
| Status Text: | Province of the Republic of China (1928–1948) Province of the People's Republic of China (1948–1952) |
| Life Span: | 1948–1952 |
| Capital: | Changyuan |
| Today: | China ∟ Inner Mongolia ∟ Hebei ∟ Beijing |
| Date Pre: | 1914 |
| Event Pre: | Chahar Special Administrative Region established |
| Year Start: | 1928 |
| Year End: | 1952 |
| Image Map Caption: | Map of Chahar within the ROC |
| Image Map2: | PRC-Chahar.png |
| Image Map2 Caption: | Map of Chahar within the PRC |
| P1: | Zhili |
| S1: | Hebei |
| S2: | Shanxi |
| Stat Year1: | 1947 |
| Stat Area1: | 278,957 |
| Stat Pop1: | 2,150,054 |
Chahar (mn|{{MongolUnicode|ᠴᠠᠬᠠᠷ;), also known as Chaha'er, Chakhar or Qahar, was a province of the Republic of China in existence from 1912 to 1936, mostly covering territory in what is part of Eastern Inner Mongolia. It was named after the Chahar Mongols.
Chahar Province is named after the Chahar, a tribal group of the Mongols who live in that area. The area was controlled (in part or fully) by various empires that ruled over China's north including the Han, Tang, Liao, and Jin dynasties. After the unification of the Mongol tribes under Genghis Khan, the area came under Yuan rule. After the Yuan dynasty (1271–1368), the area was a battleground between the Ming dynasty and Northern Yuan. Then the Chahar tribe became the personal appanage of the monarchs of the Northern Yuan dynasty since the reign of Batumongke Dayan Khan (r. 1479–1517). By the Qing dynasty (1644–1912), Chahar was a "Zhangyuan Special Region" (Chinese: 張垣特區), although Yao Xiguang (Chinese: 姚錫光) proposed making Chahar a province as early as 1908.[1]
In 1913, the second year of the Republic of China, Chahar Special Administrative Region was created as a subdivision of Zhili Province, containing 6 Banners and 11 counties:[2]
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In 1928, it became a province. The last five counties on the above list (starting from Xinghe) were partitioned to Suiyuan province. And ten counties were included from Xuanhua Subprefecture (宣化府), Koubei Circuit (口北道), Hebei Province:
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All banners belong to the Shilingol League (锡林郭勒盟).
From 1937 to 1945, it was occupied by Japan and made a part of Mengjiang, a Japanese-controlled region led by Mongol Prince Demchugdongrub of the Shilingol Alliance. The Chahar People's Anti-Japanese Army Alliance (察哈爾民眾抗日同盟軍) was established in Kalgan on May 26, 1933 by Feng Yuxiang (馮玉祥) and Ji Hongchang (吉鴻昌).
In 1952, six years after becoming communist, the province was abolished and divided into parts of Inner Mongolia, Beijing Municipality and Hebei.
| Name | Administrative Seat | Simplified Chinese | Hanyu Pinyin | Subdivisions | |
|---|---|---|---|---|---|
| Zhangjiakou | Zhangjiakou | Chinese: 张家口市 | Zhāngjiākǒu Shì | none | |
| Datong | Datong | Chinese: 大同市 | Dàtóng Shì | none | |
| Yanbei Division | Datong County | Chinese: 雁北专区 | Yànběi Zhuānqū | 13 counties | |
| Qanan Division | Xuanhua County | Chinese: 察南专区 | Chánán Zhuānqū | 11 counties | |
| Qabei Division | Zhangbei County | Chinese: 察北专区 | Cháběi Zhuānqū | 9 counties |
Chahar Province was divided north-south by the Great Wall, with North Chahar being the larger in area and South Chahar, with the capital, Zhangjiakou, being far larger in population. It had an area of 278.957km2. In North Chahar most of the land was part of the northeastern extension of the Gobi Desert.