How many people live in St. Lawrence County, NY?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 106,200 people living in St. Lawrence County, NY. That makes St. Lawrence County the 27th-most populous county in New York. It is home to 0.53% of people living in the state.
106K
population of St. Lawrence County, NY (2024)
0.53%
County share of the New York population (2024)
About 106,200 people lived in St. Lawrence County, NY in 2024.
Population estimates, 2000–2024
What are St. Lawrence County, NY’s age demographics?
About 21,000 St. Lawrence County residents are aged 65 and older in 2024. That represents 19.8% of its population. For comparison, the age group represents 18.9% of New York’s population and 18% in the US overall.
Another 20,600 St. Lawrence County residents, or 19.4% of the population, were children under 18. For comparison, the age group represents 20.1% of New York’s population and 21.6% in the US overall.
A lower share of St. Lawrence County, NY's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are St. Lawrence County, NY’s racial and ethnic demographics?
Non-Hispanic white residents make up 91.6% of the St. Lawrence County, NY population, higher than the national share of 57.5%. St. Lawrence County, NY also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (1%) than the US overall (0.72%).
In contrast, St. Lawrence County’s Hispanic population accounts for 2.6%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 2% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
St. Lawrence County, NY has a higher share of a non-Hispanic white population than New York as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in St. Lawrence County, NY is Massena with about 9,600 residents in 2024.
Cities and towns in St. Lawrence County, NY ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Massena (pt.) | 9,574 |
| 2. | Ogdensburg | 9,282 |
| 3. | Potsdam | 8,162 |
| 4. | Canton | 6,957 |
| 5. | Lisbon | 4,257 |
| 6. | Stockholm | 3,859 |
| 7. | Gouverneur | 3,587 |
| 8. | Brasher | 2,569 |
| 9. | Pierrepont | 2,534 |
| 10. | Fowler | 2,144 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
