Morristown is a village along the Saint Lawrence River in St. Lawrence County, New York, United States. The population was 395 at the 2010 census. The village is named after Gouverneur Morris.
According to the United States Census Bureau, the village has a total area of 1.0 square miles (2.6 km²), of which, 1.0 square miles (2.5 km²) of it is land and 0.1 square miles (0.1 km²) of it (4.90%) is water.
The village is north of the junction of New York State Route 12, New York State Route 37, and New York State Route 58.
The village is on the south bank of the Saint Lawrence River, opposite the City of Brockville in Canada.
As of the census of 2000, there were 456 people, 180 households, and 117 families residing in the village. The population density was 466.4 people per square mile (179.7/km²). There were 232 housing units at an average density of 237.3 per square mile (91.4/km²). The racial makeup of the village was 96.93% White, 1.32% Black or African American, 0.88% Native American, 0.44% Asian, 0.22% from other races, and 0.22% from two or more races. Hispanic or Latino of any race were 1.54% of the population.
There were 180 households out of which 31.7% had children under the age of 18 living with them, 48.3% were married couples living together, 12.8% had a female householder with no husband present, and 35.0% were non-families. 30.6% of all households were made up of individuals and 12.8% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.01.
In the village, the population was spread out with 27.9% under the age of 18, 5.7% from 18 to 24, 27.0% from 25 to 44, 25.9% from 45 to 64, and 13.6% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 92.4 males. For every 100 females age 18 and over, there were 88.0 males.
The median income for a household in the village was $27,969, and the median income for a family was $30,938. Males had a median income of $26,563 versus $20,000 for females. The per capita income for the village was $14,156. About 12.1% of families and 18.9% of the population were below the poverty line, including 26.7% of those under age 18 and 3.5% of those age 65 or over.