German Flatts is a town in Herkimer County, New York, United States. The population was 13,258 at the 2010 census.
According to the United States Census Bureau, the town of German Flatts has a total area of 34.2 square miles (88.6 km), of which 33.7 square miles (87.3 km) are land and 0.50 square miles (1.3 km), or 1.46%, are water.
The north town line is marked by the Mohawk River and the Erie Canal. The village of Ilion is in the northwest corner of the town, and the village of Mohawk is farther east, along the northern town line.
The New York State Thruway (Interstate 90) crosses the northeast part of the town. New York State Route 5S passes through the northern part of German Flatts and intersects New York State Route 28 in Mohawk village. New York State Route 168 runs southeasterly through the town from Mohawk village.
As of the census of 2000, there were 13,629 people, 5,483 households, and 3,591 families residing in the town. The population density was 403.9 people per square mile (156.0/km²). There were 5,832 housing units at an average density of 172.8 per square mile (66.7/km²). The racial makeup of the town was 97.87% White, 0.59% African American, 0.11% Native American, 0.18% Asian, 0.01% Pacific Islander, 0.20% from other races, and 1.04% from two or more races. Hispanic or Latino of any race were 1.44% of the population.
There were 5,483 households out of which 31.4% had children under the age of 18 living with them, 48.6% were married couples living together, 12.2% had a female householder with no husband present, and 34.5% were non-families. 28.8% of all households were made up of individuals and 14.2% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 3.00.
In the town, the population was spread out with 25.2% under the age of 18, 8.3% from 18 to 24, 26.7% from 25 to 44, 23.4% from 45 to 64, and 16.4% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 88.7 males. For every 100 females age 18 and over, there were 85.4 males.
The median income for a household in the town was $32,772, and the median income for a family was $39,380. Males had a median income of $29,973 versus $21,425 for females. The per capita income for the town was $14,870. About 11.1% of families and 13.7% of the population were below the poverty line, including 16.8% of those under age 18 and 11.3% of those age 65 or over.