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The Arlington CDP⁽¹⁾ had a population of 46,350 as of 2020-2024 American Community Survey 5-Year Estimates. Arlington ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Massachusetts. See peer rankings below.

The primary coordinate point for Arlington is located at latitude 42.4154 and longitude -71.1564 in Middlesex County. The formal boundaries for the Arlington Census Designated Place encompass a land area of 5.15 sq. miles and a water area of 0.35 sq. miles. Middlesex County is in the Eastern time zone (GMT -5).

The Arlington Census Designated Place has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Arlington Census Designated Place is located within Town of Arlington, a minor civil division (MCD) of Middlesex County.

A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

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Arlington, MA Data & Demographics

Source: 2020-2024 American Community Survey 5-Year Estimates

POPULATION
Total Population	46,350 (100%)
Population Density	9,013 per sq mi
Diversity Index¹	43


INCOME
Median Household Income	$150,701
Per Capita Income	$91,718
Median Home Value	$933,800

HOUSING
Total HU (Housing Units)	20,746 (100%)
Owner Occupied HU	12,325 (59.4%)
Renter Occupied HU	7,680 (37.0%)
Vacant Housing Units	741 (3.6%)

HOUSEHOLDS
Total Households	20,005
Average Household Size	2.30
Family Households	12,105 (60.5%)

NOTES

The Diversity Index estimates the likelihood that two persons chosen at random from the same area belong to different race or ethnic groups, based on five groups: Hispanic/Latino, Non-Hispanic White, Non-Hispanic Black, Non-Hispanic Asian, and Non-Hispanic Other/Multiracial. A value of 0 indicates the population belongs entirely to one group. Higher values indicate a more evenly mixed population. Calculated from U.S. Census Bureau ACS 5-year estimates (table B03002).

Arlington, MA - Peer Comparisons by Rank and Percentile

The table below compares Arlington to the other 248 incorporated cities, towns and CDPs in Massachusetts by rank and percentile using 2020-2024 American Community Survey 5-Year Estimates data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description	Rank	Percentile
Total Population	# 29	89th
Population Density	# 12	96th
Median Household Income	# 37	85th
Per Capita Income	# 25	90th
Diversity Index	# 65	74th

Additional comparisons and rankings can be made with a VERY EASY TO USE Massachusetts Census Data Comparison Tool.

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Arlington, MA Profile: Facts & Data

Arlington, Massachusetts - Basic Facts

Arlington, MA Data & Demographics

POPULATION

INCOME

HOUSING

HOUSEHOLDS

Arlington, MA - Peer Comparisons by Rank and Percentile

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