Onset, MA Profile: Facts, Map & Data


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Onset, Massachusetts - Basic Facts

The Onset Census Designated Place had a population of 1,618 as of July 1, 2016. Onset ranks in the upper quartile for 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 Onset is located at latitude 41.746 and longitude -70.6682 in Plymouth County. The formal boundaries for the Onset Census Designated Place (see map below) encompass a land area of 1.08 sq. miles and a water area of 0.22 sq. miles. Plymouth County is in the Eastern time zone (GMT -5). The elevation is 16 feet.

The Onset Census Designated Place (GNIS ID: 2378196) 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 Onset Census Designated Place is located within Town of Wareham, a minor civil division (MCD) of Plymouth County.

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

Neighborhood Data

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Onset Census Designated Place, MA Boundary Map

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Boundary Maps: Town of Wareham | Plymouth County | Massachusetts Counties

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


Total Population 1,618
Population in Households 1,618
Population in Familes 1,164
Population in Group Qrtrs 0
Population Density1 1,501
Diversity Index2 59


Total Households 740
Average Household Size 2.19
Family Households 398
Average Family Size 3


Total Housing Units 1,259 (100%)
Owner Occupied HU 409 (32.5%)
Renter Occupied HU 331 (26.3%)
Vacant Housing Units 519 (41.2%)
Median Home Value $259,961
Average Home Value $308,313


Median Household Income $57,984
Average Household Income $78,488
Per Capita Income $35,897
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.45% 0.63%
Households 0.44% 0.56%
Families 0.33% 0.5%
Median Household Income   2.97%
Per Capita Income   2.09%
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.

Onset, MA - Peer Comparisons by Rank and Percentile

The table below compares Onset 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 # 205 17th
Population Density1 # 118 52nd
Diversity Index2 # 25 90th
Median Household Income # 170 31st
Per Capita Income # 136 45th

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

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