The Taichung–Changhua metropolitan area () is the second largest metropolitan area of Taiwan. Prior to city-county merger, it was officially defined as follows:
Taichung City (core city)Changhua CountyBeitun District Central District Dadu District Dali District Daya District East District Longjing District Nantun DistrictNorth District South District Taiping District Tanzi District Xitun District West District Wufeng District Wuri DistrictChanghua City (core city) Hemei Township Huatan Township
Since the merger of Taichung City and the former Taichung County, the term is no longer in official usage.
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