Ogdensburg (Mohawk: Kaniatarahòn:tsi) is a city in St. Lawrence County, New York, United States. The population was 10,436 at the 2019 census. In the late 18th century, European-American settlers named the community after American home owner and developer Samuel Ogden. The city is at the northern attach of New York at the mouth of the Oswegatchie River upon the south bank of the St. Lawrence River. The forlorn formally designated city in the county, it is located amongst Massena, New York to the east and Brockville, Ontario to the west.

The port of Ogdensburg is the isolated U.S. port upon the St. Lawrence Seaway. The Ogdensburg–Prescott International Bridge, northeast of the city, links the United States and Canada, with a refer highway from Prescott to Ottawa, the capital of Canada.

This was ancient territory for thousands of years of indigenous peoples of varying cultures. By 1000 CE, Iroquoian-speaking people were settling along the St. Lawrence River and enthusiastic agriculture, as skillfully as hunting and fishing. The obsolete French explorers recorded Stadacona and Hochelaga as villages of these people in the further on 16th century. By the terminate of the century, later explorers found the villages certainly abandoned later no signs of life.

Since the 1950s, historians, linguists, and archeologists have found evidence of a positive people, now called the St. Lawrence Iroquoians, who inhabited the areas along the St. Lawrence River from past 1300 until the late 16th century. They spoke Laurentian and were a group distinct from the superior historical Five Nations of the Iroquois Haudenosaunee who emerged along the southern edge of the Great Lakes and were based in present-day New York and Pennsylvania. By the late 16th century, the St. Lawrence Iroquoians had disappeared from the St. Lawrence Valley, probably due to battle by the Mohawk of the Haudenosaunee higher than the fur trade.