OGDENSBURG, a town of the United States of North America, state of New York, on a plain at the confluence of the Oswegatchie with the St. Lawrence, 200 miles N.N.W. of Albany. It is well and regularly built; and contains numerous churches, belonging to Presbyterians, Episcopalians, Methodists, Baptists, and Roman Catholics; an academy; and three banks. There are iron-foundries, machine-shops, and other manufactures. The trade of the town is considerable; and it communicates by steam-vessels with the different ports on Lake Ontario. It is also connected by railway with Boston and New York. The number of vessels that entered the port in 1852 was 830; tonnage, 347,698; that cleared, 798; tonnage, 341,188. Pop. (1853) about 6500.