Nicholson Island is a small island in Lake Ontario about 3 kilometres (1.9 mi) west of Prince Edward County, Ontario.
[1] It is one of the islands and shoals in the Scotch Bonnet Ridge.
In 1834 Nicholson Island was under consideration as the site of a lighthouse.
[1] In 1844 nearby Scotch Bonnet Island was chosen as the site of a lighthouse.
Small, low Scotch Bonnet Island's lighthouse was not fit for human occupancy during the winter, so a lighthouse keeper's house was built on Nicholson Island in 1866.