​OGDENSBURG, a city and port of entry in St. Lawrence co., N. Y.; at the confluence of the St. Lawrence and the Oswegatchie rivers, and on the New York Central and Hudson River and Rutland railroads; 175 miles N. N. W. of Albany. The city has a large river trade, and a steam ferry to Prescott, Canada; contains a United States government building, refuge for the aged, orphanage, academy, hospital, public library, street railroad and electric light plants. National and State banks, daily and weekly newspapers and many fine public and private buildings. It has grain elevators, flour and lumber mills, leather factories. Manufactures of silk, curtain rods, clothing. Pop. (1910) 15,933; (1920) 14,609.