Watertown, MA Profile: Facts, Map & Data


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Watertown, Massachusetts - Basic Facts

The City of Watertown Town had a population of 33,835 as of July 1, 2016. Watertown ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Massachusetts. See peer rankings below.

The primary coordinate point for Watertown is located at latitude 42.3694 and longitude -71.1779 in Middlesex County. The formal boundaries for the City of Watertown Town (see map below) encompass a land area of 3.99 sq. miles and a water area of 0.12 sq. miles. Middlesex County is in the Eastern time zone (GMT -5). The elevation is 62 feet.

The City of Watertown Town (GNIS ID: 618242) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Beneath the boundary map are tables with Watertown population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Alternate Unofficial Names for Watertown: Saltonstall Plantation.

Neighborhood Data

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City of Watertown Town, MA Boundary Map

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Watertown, MA Data & Demographics (As of July 1, 2016)


Total Population 33,835
Population in Households 33,597
Population in Familes 22,359
Population in Group Qrtrs 238
Population Density1 8,473
Diversity Index2 42


Total Households 15,528
Average Household Size 2.16
Family Households 7,757
Average Family Size 3


Total Housing Units 16,531 (100%)
Owner Occupied HU 7,491 (45.3%)
Renter Occupied HU 8,037 (48.6%)
Vacant Housing Units 1,003 ( 6.1%)
Median Home Value $468,907
Average Home Value $493,062


Median Household Income $83,183
Average Household Income $108,076
Per Capita Income $49,745
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.94% 1.06%
Households 0.87% 1.01%
Families 0.73% 0.94%
Median Household Income   2.81%
Per Capita Income   1.9%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Watertown, MA - Peer Comparisons by Rank and Percentile

The table below compares Watertown to the other 246 incorporated cities, towns and CDPs in Massachusetts by rank and percentile using July 1, 2016 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 # 41 84th
Population Density1 # 13 95th
Diversity Index2 # 50 80th
Median Household Income # 63 75th
Per Capita Income # 45 82nd

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

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