Transmarisca Bay (Bulgarian: залив Трансмариска, ‘Zaliv Transmarisca’ \'za-liv trans-ma-'ri-ska\) is the 4.3 km wide bay indenting for 3.2 km the north coast of Krogh Island in Biscoe Islands, Antarctica. It is entered east of Edholm Point and west of Kuvikal Point.
The bay is named after the ancient Roman town of Transmarisca in Northeastern Bulgaria.