is a borough in Westmoreland County
-Demographics:As of the census of 2000, there were 369,993 people, 149,813 households, and 104,569 families residing in the county. The population density was 361 people per square mile . There were 161,058 housing units at an average density of 157 per square mile...
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...
, 22 miles (35.4 km) southeast of Pittsburgh. Some of the most extensive bituminous coal
Bituminous coal or black coal is a relatively soft coal containing a tarlike substance called bitumen. It is of higher quality than lignite coal but of poorer quality than Anthracite...
deposits in the State are located here. In the past, iron foundries, flour mills, car shops, facing and planing mills, electrical goods, and mirror factories provided employment to the residents. In 1900, the population numbered 2,452; it increased to 2,886 in 1910. The population was 4,366 at the 2000 census.
According to the United States Census Bureau
The United States Census Bureau is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data...
, the borough has a total area of 0.9 square miles (2.3 km²), all of it land.
As of the census
A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common...
of 2000, there were 4,366 people, 2,084 households, and 1,131 families residing in the borough. The population density
Population density is a measurement of population per unit area or unit volume. It is frequently applied to living organisms, and particularly to humans...
was 4,947.0 people per square mile (1,915.6/km2
). There were 2,277 housing units at an average density of 2,580.0 per square mile (999.0/km2
). The racial makeup of the borough was 96.61% White, 1.01% African American, 0.09% Native American, 1.19% Asian, 0.02% Pacific Islander, 0.37% from other races
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
, and 0.71% from two or more races. Hispanic or Latino of any race were 0.66% of the population.
There were 2,084 households out of which 25.1% had children under the age of 18 living with them, 38.8% were married couples
Marriage is a social union or legal contract between people that creates kinship. It is an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged in a variety of ways, depending on the culture or subculture in which it is found...
living together, 12.0% had a female householder with no husband present, and 45.7% were non-families. 39.5% of all households were made up of individuals and 15.1% had someone living alone who was 65 years of age or older. The average household size was 2.09 and the average family size was 2.83.
In the borough the population was spread out with 20.9% under the age of 18, 8.9% from 18 to 24, 32.7% from 25 to 44, 21.2% from 45 to 64, and 16.4% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 87.9 males. For every 100 females age 18 and over, there were 85.1 males.
The median income for a household in the borough was $32,758, and the median income for a family was $41,947. Males had a median income of $31,901 versus $23,519 for females. The per capita income
Per capita income or income per person is a measure of mean income within an economic aggregate, such as a country or city. It is calculated by taking a measure of all sources of income in the aggregate and dividing it by the total population...
for the borough was $18,722. About 6.6% of families and 8.8% of the population were below the poverty line, including 8.4% of those under age 18 and 5.6% of those age 65 or over.
Brush Creek Cemetery is located outside of Irwin. It is a is a non-profit, non-sectarian cemetery.