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It is situated in Middlesex County, Massachusetts. It is bordered on the south by the town of Belmont, on the south and east by the city of Cambridge, on the west by the town of Lexington, on the north by the town of Winchester, and on the east by the cities of Medford and Somerville.
Arlington covers 3,517.5 acres (14 km˛), or 5.5 square miles, of which 286.2 acres (1.2 km˛) are covered by water. There are 210.52 acres (0.9 km˛) of parkland.
According to the United States Census Bureau, the CDP has a total area of 14.3 km˛ (5.5 mi˛). 13.4 km˛ (5.2 mi˛) of it is land and 0.9 km˛ (0.3 mi˛) of it is water. The total area is 5.99% water.
Prior to changing the name to Arlington in 1867 in honor of those buried in Arlington National Cemetery, the area including part of what is now Belmont was incorporated in 1807 as West Cambridge. The Town of Arlington was originally settled in 1635 as a village under the name Menotomy, an AlgonquianThe Algonquian languages are a subfamily of Native American languages that includes most of the languages in the Algic language family (others are Wiyot and Yurok of northwestern California). They should be carefully distinguished from Algonquin, which is word meaning "fast moving water".
The water to which this name referred was later named Mill Brook and figured largely into Arlington's economy. Seven mills were built along the stream, including the Schwamb Mill which survives to this day. The Schwamb Mill has been a working mill since 1650, making it the longest working mill in the country.
The Jason Russell house is today a museum which remembers those twelve Americans who were killed in and around this pictured dwelling on April 19th, 1775.
Arlington currently has approximately 42,000 residents. Based on the U.S. censuses, Arlington's population has been declining by an average of 7% per decade since 1970. (1970: 52,720; 2000: 42,389).
As of the censusA census is the process of obtaining information about every member of a population (not necessarily a human population). It can be contrasted with sampling in which information is only obtained from a subset of a population. As such it is a method used f 2The following is a list of sources used in the creation of Wikipedia articles on various geographic topics and locations, such as cities, counties, states, and countries. These sources are cited within the thousands of articles which link to this page. of 2000, there are 42,389 people, 19,011 households, and 10,779 families residing in the CDP. The population densityIf you were linked from a country article: the density there is based on land area, see below Population density can be used as a measurement of any tangible item. However it is most frequently applied to living organisms. Population density is usually ex is 3,159.6/km˛ (8,179.6/mi˛). There are 19,411 housing units at an average density of 1,446.8/km˛ (3,745.6/mi˛). The racial makeup of the CDP is 90.97% White, 1.70% African American, 0.13% Native American, 4.97% Asian, 0.01% Pacific Islander, 0.66% from other races, and 1.56% from two or more races. 1.86% of the population are Hispanic or Latino of any race.
There are 19,011 households out of which 23.1% have children under the age of 18 living with them, 45.4% are married couples living together, 8.8% have a female householder with no husband present, and 43.3% are non-families. 34.2% of all households are made up of individuals and 12.5% have someone living alone who is 65 years of age or older. The average household size is 2.22 and the average family size is 2.91.
In the CDP the population is spread out with 18.4% under the age of 18, 5.1% from 18 to 24, 36.0% from 25 to 44, 23.7% from 45 to 64, and 16.8% who are 65 years of age or older. The median age is 40 years. For every 100 females there are 86.7 males. For every 100 females age 18 and over, there are 83.1 males.
The median income for a household in the CDP is $64,344, and the median income for a family is $78,741. Males have a median income of $52,352 versus $40,445 for females. The per capita income for the CDP is $34,399. 4.1% of the population and 2.4% of families are below the poverty line. Out of the total population, 2.0% of those under the age of 18 and 5.5% of those 65 and older are living below the poverty line.