Grantsville is a town in the northern part of Garrett County, Maryland, United States, near the Pennsylvania border. The population was 766 at the 2010 census.
Grantsville is located at 39°41′49″N 79°9′21″W / 39.69694°N 79.15583°W / 39.69694; -79.15583 (39.6970, -79.1559).
According to the United States Census Bureau, the town has a total area of 0.98 square miles (2.54 km), all land.
In the 1960s the town had a stable population of approximately 400 individuals.
As of the census of 2010, there were 766 people, 350 households, and 213 families residing in the town. The population density was 781.6 inhabitants per square mile (301.8/km). There were 397 housing units at an average density of 405.1 per square mile (156.4/km). The racial makeup of the town was 98.3% White, 0.1% African American, 0.4% Native American, and 1.2% from two or more races. Hispanic or Latino of any race were 1.6% of the population.
There were 350 households of which 32.3% had children under the age of 18 living with them, 39.1% were married couples living together, 17.1% had a female householder with no husband present, 4.6% had a male householder with no wife present, and 39.1% were non-families. 35.7% of all households were made up of individuals and 19.5% had someone living alone who was 65 years of age or older. The average household size was 2.19 and the average family size was 2.77.
The median age in the town was 38.4 years. 23.5% of residents were under the age of 18; 11.1% were between the ages of 18 and 24; 22.9% were from 25 to 44; 22.7% were from 45 to 64; and 19.8% were 65 years of age or older. The gender makeup of the town was 47.1% male and 52.9% female.
As of the census of 2000, there were 619 people, 278 households, and 177 families residing in the town. The population density was 877.2 people per square mile (336.6/km²). There were 298 housing units at an average density of 422.3 per square mile (162.1/km²). The racial makeup of the town was 98.87% White, 0.48% African American, 0.32% Asian, and 0.32% from two or more races. Hispanic or Latino of any race were 0.48% of the population.
There were 278 households out of which 30.6% had children under the age of 18 living with them, 43.5% were married couples living together, 14.7% had a female householder with no husband present, and 36.0% were non-families. 33.1% of all households were made up of individuals and 12.2% had someone living alone who was 65 years of age or older. The average household size was 2.22 and the average family size was 2.74.
In the town, the population was spread out with 24.4% under the age of 18, 8.2% from 18 to 24, 28.9% from 25 to 44, 24.1% from 45 to 64, and 14.4% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 86.4 males. For every 100 females age 18 and over, there were 85.0 males.
The median income for a household in the town was $27,778, and the median income for a family was $35,000. Males had a median income of $29,167 versus $21,250 for females. The per capita income for the town was $15,625. About 22.2% of families and 23.8% of the population were below the poverty line, including 38.0% of those under age 18 and 8.8% of those age 65 or over.