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|— Borough —|
|Incorporated||November 14, 1864|
|- Type||Borough Council|
|- Total||0.9 sq mi (2.3 km2)|
|Elevation||324 ft (99 m)|
|- Density||4,947.0/sq mi (1,910/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|- Summer (DST)||EDT (UTC-4)|
Irwin is a borough in Westmoreland County, Pennsylvania, 22 miles (35 km) southeast of Pittsburgh. Some of the most extensive bituminous coal 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.
As of the census of 2000, there were 4,366 people, 2,084 households, and 1,131 families residing in the borough. The population density 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, 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 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 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.
- ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. http://www.census.gov/geo/www/gazetteer/gazette.html. Retrieved 2011-04-23.
- ^ "American FactFinder". United States Census Bureau. http://factfinder.census.gov. Retrieved 2008-01-31.
- ^ Brush Creek Cemetery
- ^ Old Brush Creek Cemetery, North Huntingdon Township, Westmoreland County Pennsylvania