Ayer, MA Profile: Facts, Map & Data


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Ayer, Massachusetts - Basic Facts

The Ayer Census Designated Place had a population of 2,950 as of July 1, 2017. Ayer 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 Ayer is located at latitude 42.5622 and longitude -71.5848 in Middlesex County. The formal boundaries for the Ayer Census Designated Place (see map below) encompass a land area of 1.33 sq. miles and a water area of 0.06 sq. miles. Middlesex County is in the Eastern time zone (GMT -5). The elevation is 236 feet.

The Ayer Census Designated Place (GNIS ID: 2377983) 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 Ayer Census Designated Place is located within Town of Ayer, a minor civil division (MCD) of Middlesex County.

Beneath the boundary map are tables with Ayer population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Ayer: Ayer Groton Junction, Ayer Junction.

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Ayer Census Designated Place, MA Boundary Map

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Ayer, MA Data & Demographics (As of July 1, 2017)


Total Population 2,950
Daytime Population: Workers 1,527
Daytime Population: Residents 1,433
Total Daytime Population (TDP) 2,960
Ratio TDP/Total Population1 1.00
Population in Households 2,795
Population in Familes 1,930
Population in Group Qrtrs 155
Population Density2 2,225
Diversity Index3 44


Median Household Income $53,510
Average Household Income $71,723
Per Capita Income $32,428


Total Housing Units 1,550 (100%)
Owner Occupied HU 609 (39.3%)
Renter Occupied HU 750 (48.4%)
Vacant Housing Units 191 (12.3%)
Median Home Value $275,568
Average Home Value $306,281


Total Households 1,359
Average Household Size 2.06
Family Households 676
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood 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.


2010-2017 2017-2022
Population 0.39% 0.48%
Households 0.22% 0.42%
Families 0.08% 0.24%
Median Household Income   1.45%
Per Capita Income   2.49%

Ayer, MA - Peer Comparisons by Rank and Percentile

The table below compares Ayer to the other 246 incorporated cities, towns and CDPs in Massachusetts by rank and percentile using July 1, 2017 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 # 155 37th
Population Density # 69 72nd
Diversity Index # 47 81st
Median Household Income # 194 22nd
Per Capita Income # 168 32nd

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

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