According to the definition of metropolitan areas formerly used by the Republic of China government in Taiwan, Tainan metropolitan area (Chinese: 臺南都會區; pinyin: Táinán Dūhuì Qū) includes the following areas:
However, since the merger of Tainan City and the former Tainan County, the Republic of China (Taiwan) government has abolished the definition as obsolete.
Coordinates: 22°38′00″N 120°23′00″E / 22.6333°N 120.3833°E