The township is made up of nineteen islands, six of which are inhabited.

[9] The township is located in the southern sea of Penghu.

Islands in the township include:[3][10][11][12] The northern side of the main island has a higher average elevation than the southern side.

There are also ferries to Magong and other nearby islands from Tanmen Harbor.

There are four schools in Wangan, operated by the county government: