Lisbon is a town in St. Lawrence County, New York, United States. The Town of Lisbon is in the northern part of the county and is northwest of Canton. By some accounts, the town is named after the capital of Portugal. However, the 1810 US Census for the town shows the town's name as Lisburn, which is a city located in Northern Ireland adjacent to the capital of Belfast. Belfast was the birthplace of Alexander Macomb, the prosperous New York City merchant of Loyalist sympathies. Earlier in 1791, he purchased much of Northern New York along the St. Lawrence River and Lake Ontario, which the state had released for public sale after cession of the land by the Iroquois. With partners, Macomb sold the land for development.