Tirizis Island (Bulgarian: остров Тиризис|ostrov Tirizis, in Bulgarian pronounced as /ˈɔstrof tiˈrizis/) is the rocky island off the east coast of Robert Island in the South Shetland Islands, Antarctica extending 1.05 km in east-west direction and 350 m wide. It is ending in Kitchen Point to the east, and separated from the main island to the west by a 100 m wide passage formed as a result of glacier retreat in the late first decade of 21st century.
The feature is named after the ancient Thracian town of Tirizis in northeastern Bulgaria.
Tirizis Island is located at -62.3889°N -59.3542°W.
