Fort Johnson (formerly known as Akin) is a village in Montgomery County, New York, United States located on the north side of the Mohawk River. The population was 490 at the 2010 census.
Fort Johnson is located at 42°57′30″N 74°14′10″W / 42.95833°N 74.23611°W / 42.95833; -74.23611 (42.958303, -74.236018).
According to the United States Census Bureau, the village has a total area of 0.8 square miles (2.1 km), of which, 0.7 square miles (1.8 km) of it is land and 0.1 square miles (0.26 km) of it (11.90%) is water.
The village is on the north bank of the Mohawk River at the influx of the Kayaderosseras Creek [of Montgomery County]. Pepper Island in the Mohawk River is south of the village.
New York State Route 5, an east-west highway, passes through the south part of the village, where it is joined by New York State Route 67, Fort Johnson Avenue.
As of the census of 2000, there were 491 people, 198 households, and 139 families residing in the village. The population density was 659.8 people per square mile (256.2/km²). There were 220 housing units at an average density of 295.6 per square mile (114.8/km²). The racial makeup of the village was 98.17% White, 0.61% African American, 0.20% Native American, and 1.02% from two or more races. Hispanic or Latino of any race were 2.04% of the population.
There were 198 households out of which 30.3% had children under the age of 18 living with them, 54.5% were married couples living together, 10.1% had a female householder with no husband present, and 29.3% were non-families. 24.2% of all households were made up of individuals and 9.6% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 2.89.
In the village, the population was spread out with 22.0% under the age of 18, 6.7% from 18 to 24, 29.1% from 25 to 44, 25.5% from 45 to 64, and 16.7% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 92.5 males. For every 100 females age 18 and over, there were 89.6 males.
The median income for a household in the village was $37,639, and the median income for a family was $44,750. Males had a median income of $31,776 versus $22,813 for females. The per capita income for the village was $21,172. About 2.1% of families and 7.1% of the population were below the poverty line, including 2.1% of those under age 18 and 8.7% of those age 65 or over.