| Shimoji Island | |
| Native Name Link: | Japanese language |
| Location: | Okinawa Prefecture |
| Coordinates: | 24.8161°N 125.1569°W |
| Archipelago: | Miyako Islands |
| Area Km2: | 9.68 |
| Area Footnotes: | [1] |
| Population: | 76 |
| Population As Of: | 2015 national census |
| Elevation M: | 21.6 |
| Country: | Japan |
| Country Admin Divisions Title: | Prefecture |
| Country Admin Divisions: | Okinawa Prefecture |
, (Miyako: Sïmuzï) is one of the Miyako Islands, a part of the Ryukyu Islands. The island is administered by Miyakojima, Okinawa Prefecture, Japan. The island is connected to Irabu Island via .Shimoji-shima is included within the Irabu Prefectural Natural Park and is the main setting for the anime series Stratos 4.
Shimojishima Airport is located on the island.
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