Geography
Armagh is located at 40°27'13" North, 79°1'50" West (40.453549, -79.030500)1.
According to the United States Census Bureau, the borough has a total area of 0.2 km² (0.1 mi²) land. None of the area is covered with water.
Demographics
As of the census of 2000, there are 131 people, 54 households, and 40 families residing in the borough. The population density is 843.0/km² (2,301.9/mi²). There are 59 housing units at an average density of 379.7/km² (1,036.7/mi²). The racial makeup of the borough is 100.00% White.
There are 54 households out of which 24.1% have children under the age of 18 living with them, 61.1% are married couples living together, 9.3% have a female householder with no husband present, and 24.1% are non-families. 24.1% of all households are made up of individuals and 11.1% have someone living alone who is 65 years of age or older. The average household size is 2.43 and the average family size is 2.83.
In the borough the population is spread out with 18.3% under the age of 18, 10.7% from 18 to 24, 27.5% from 25 to 44, 23.7% from 45 to 64, and 19.8% who are 65 years of age or older. The median age is 42 years. For every 100 females there are 98.5 males. For every 100 females age 18 and over, there are 98.1 males.
The median income for a household in the borough is $31,806, and the median income for a family is $34,167. Males have a median income of $30,833 versus $24,167 for females. The per capita income for the borough is $18,309. 10.9% of the population and 7.1% of families are below the poverty line. Out of the total people living in poverty, 20.0% are under the age of 18 and 6.9% are 65 or older.