T. T. Martin, an evangelist and one of the most prominent figures in the anti-evolution movement in the 1920's, is buried in Gloster.
According to the United States Census Bureau, the town has a total area of 1.8 square miles (4.7 km²), all of it land.
There were 422 households out of which 35.8% had children under the age of 18 living with them, 36.7% were married couples living together, 29.4% had a female householder with no husband present, and 29.1% were non-families. 26.8% of all households were made up of individuals and 14.9% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 3.05.
In the town the population was spread out with 30.4% under the age of 18, 10.1% from 18 to 24, 24.6% from 25 to 44, 21.1% from 45 to 64, and 13.9% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 77.6 males. For every 100 females age 18 and over, there were 74.1 males.
The median income for a household in the town was $19,922, and the median income for a family was $23,750. Males had a median income of $25,833 versus $17,222 for females. The per capita income for the town was $10,536. About 35.0% of families and 39.8% of the population were below the poverty line, including 61.5% of those under age 18 and 22.4% of those age 65 or over.