Gettysburg was founded by natives of Adams County, Pennsylvania in the late 1820’s. When the settlement was platted in 1842, the community was named for Gettysburg, the county seat of Adams County. The community’s first church was a congregation of the Presbyterian Church in the United States of America, established in 1847 or 1848, while the first school was built in 1850.
According to the United States Census Bureau, the village has a total area of 0.44 square miles (1.14 km2), all of it land.
As of the census of 2010, there were 513 people, 170 households, and 127 families residing in the village. The population density was 1,165.9 inhabitants per square mile (450.2 /km2). There were 194 housing units at an average density of 440.9 per square mile (170.2 /km2). The racial makeup of the village was 97.5% White, 0.4%African American, 0.2% Asian, 0.2% from other races, and 1.8% from two or more races. Hispanic or Latino of any race were 0.6% of the population.
There were 170 households of which 44.1% had children under the age of 18 living with them, 55.3% were married couples living together, 12.4% had a female householder with no husband present, 7.1% had a male householder with no wife present, and 25.3% were non-families. 20.6% of all households were made up of individuals and 4.1% had someone living alone who was 65 years of age or older. The average household size was 3.02 and the average family size was 3.44.
The median age in the village was 32.7 years. 32.4% of residents were under the age of 18; 8% were between the ages of 18 and 24; 26.3% were from 25 to 44; 23.8% were from 45 to 64; and 9.6% were 65 years of age or older. The gender makeup of the village was 49.1% male and 50.9% female.