|• Total||27.33 sq mi (70.78 km2)|
|• Land||24.99 sq mi (64.72 km2)|
|• Water||2.34 sq mi (6.06 km2)|
|Elevation||118 ft (36 m)|
|• Estimate (2012)||3,717|
|• Density||149.4/sq mi (57.7/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|GNIS feature ID||0582652|
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Orrington was originally part of Condustiegg (or Kenduskeag) Plantation, which also included the present-day cities of Bangor and Brewer. Orrington was incorporated as a town in 1788 with its major village at Brewer, then called "New Worcester". Bangor incorporated three years later in 1791. Brewer broke away from Orrington in 1812 to form a separate town.
The name "Orrington" reportedly resulted from a spelling mistake. The settlers intended to name it "Orangetown" after Orangetown, Maryland, but it was written on the record-books in distant Massachusetts, of which Maine was then a territory, as "Orrington". "Orring" was a reasonable phonetic rendering of "orange" before the standardization of English spelling.
According to the United States Census Bureau, the town has a total area of 27.33 square miles (70.78 km2), of which, 24.99 square miles (64.72 km2) of it is land and 2.34 square miles (6.06 km2) is water.
As of the census of 2010, there were 3,733 people, 1,478 households, and 1,068 families residing in the town. The population density was 149.4 inhabitants per square mile (57.7/km2). There were 1,612 housing units at an average density of 64.5 per square mile (24.9/km2). The racial makeup of the town was 98.2% White, 0.2% African American, 0.4% Native American, 0.6% Asian, 0.2% from other races, and 0.5% from two or more races. Hispanic or Latino of any race were 0.9% of the population.
There were 1,478 households of which 30.7% had children under the age of 18 living with them, 60.5% were married couples living together, 7.8% had a female householder with no husband present, 3.9% had a male householder with no wife present, and 27.7% were non-families. 20.3% of all households were made up of individuals and 8.1% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 2.91.
The median age in the town was 43.5 years. 21.9% of residents were under the age of 18; 6.8% were between the ages of 18 and 24; 23.7% were from 25 to 44; 34.1% were from 45 to 64; and 13.5% were 65 years of age or older. The gender makeup of the town was 49.6% male and 50.4% female.
As of the census of 2000, there were 3,526 people, 1,396 households, and 1,042 families residing in the town. The population density was 138.8 people per square mile (53.6/km²). There were 1,489 housing units at an average density of 58.6 per square mile (22.6/km²). The racial makeup of the town was 99.09% White, 0.20% African American, 0.11% Native American, 0.23% Asian, 0.03% from other races, and 0.34% from two or more races. Hispanic or Latino of any race were 0.14% of the population.
There were 1,396 households out of which 32.7% had children under the age of 18 living with them, 64.3% were married couples living together, 7.1% had a female householder with no husband present, and 25.3% were non-families. 19.3% of all households were made up of individuals and 8.7% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 2.89.
In the town the population was spread out with 23.6% under the age of 18, 5.8% from 18 to 24, 29.8% from 25 to 44, 28.8% from 45 to 64, and 12.1% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 99.9 males. For every 100 females age 18 and over, there were 96.7 males.
The median income for a household in the town was $44,327, and the median income for a family was $47,803. Males had a median income of $35,250 versus $27,381 for females. The per capita income for the town was $19,290. About 2.4% of families and 4.3% of the population were below the poverty line, including 3.6% of those under age 18 and 5.8% of those age 65 or over.
Orrington is home to a Pre-Kindergarten through 8th grade school for its residents. Center Drive School, named after the road it is located on, has about 400 students. The mascot of Center Drive School is the Eagles.
- Ebenezer M. Chamberlain (1805–1861), US congressman from Indiana
- Molly Kool, first female master mariner in North America
- Benjamin Franklin Mudge (1817–1879), geologist, paleontologist
- Enoch Mudge, first American-born Methodist minister, state congressman
- Thomas H. Mudge, Methodist minister, professor of theology
- Zachariah A. Mudge, Methodist clergyman, author
- Edward A. Pierce, Wall St. banker, one of founders of Merrill, Lynch, Pierce, Fenner, and Smith, Inc., now Merrill Lynch
- "US Gazetteer files 2010". United States Census Bureau. Retrieved 2012-12-16.
- "American FactFinder". United States Census Bureau. Retrieved 2012-12-16.
- "Population Estimates". United States Census Bureau. Retrieved 2013-07-06.
- DeLorme Mapping Company The Maine Atlas and Gazetteer (13th edition) (1988) ISBN 0-89933-035-5 map 23
- "Geographic Identifiers: 2010 Demographic Profile Data (G001): Orrington town, Penobscot County, Maine". U.S. Census Bureau, American Factfinder. Retrieved November 20, 2012.
- George J. Varney, Gazetteer of the State of Maine (Boston, 1886)
- "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2014". Retrieved June 4, 2015.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.