Wangan County comes under the jurisdiction of Penghu County. At present it's home to more than 5,000 inhabitants. The total surface area is 13.8 square meters, and it has eighteen islets.
望安鄉隸屬於澎湖縣，現有居民五千多人，總面積十三點七八平方公里，不過是台北市的廿分之一。