| Geography | |
|---|---|
| Location | Baisha, Penghu, Taiwan |
| Coordinates | 23°42′54″N 119°33′22″E / 23.715°N 119.556°E |
Gupo Island (Chinese: 姑婆嶼; pinyin: Gūpó Yǔ; Pe̍h-ōe-jī: Ko͘-pô-sū), also transliterated as Koba Island, is an island in Baisha Township, Penghu County, Taiwan.


The island is uninhabitated.
Nearby residents come to the island for laver harvest in early winter every year.