Bayville's total area is 1.5 square miles. 1.4 is made up of land and .1 is made up of water. Frank M. Flower & Sons, Inc. is Bayville's only commercial business. It has been there since 1887. Bayville got electricity in 1906. The Bayville Bridge that is there today is the fourth bridge. The first bridge there was built in 1898. Before that, people went between Bayville to Oyster Bay by water taxi.