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is located within the Town of Oyster Bay in Nassau County, New York, United States. The population was 7,135 at the 2000 census.
Bayville was a popular tourist destination in the early 20th century, featuring a sandy beach and an entertainment "casino" with dining, dancing and bowling.
According to the United States Census Bureau, the village has a total area of 1.5 square miles (3.8 km²), of which, 1.4 square miles (3.7 km²) of it is land and 0.1 square miles (0.1 km²) of it (3.42%) is water.