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Ayer

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Ayer
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Ayer

Founded

1668

Elevation69 m
Land area9.6 km²
Weather67°F · Mostly Sunny
Coordinates42.56°, -71.58°

Demographic figures from US Census Bureau · ACS 5-year estimates. Overview below cites Wikipedia and may reference a different year.

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City facts

Founded
1668
Elevation
69 m
Area
9.6 km²
Time zone
Q5390
Official website
www.ayer.ma.us

Facts from Wikidata (CC0).

Overview

Ayer is a town in Middlesex County, Massachusetts, United States. Originally part of Groton, it was incorporated February 14, 1871, and became a major commercial railroad junction. The town was home to Camp Stevens, a training camp for Massachusetts volunteers during the American Civil War. Later, Fort Devens was established by the federal government to train New England soldiers for World War I. Fort Devens is a major influence on the area, although it is considerably smaller than when it was first closed in the mid-1990s. The town's population was 8,479 at the 2020 census. It contains the census-designated places of Ayer and Devens.

Read more on Wikipedia

History & geography

History

Ayer was originally inhabited by the Nashaway, a Nipmuc people that inhabited the lands along the Nashua River and its tributaries. A small settlement was located along the banks of the Nonacoicus Brook, located in the western part of the town. The name of the Nashaway village, its people and the brook, pronounced by locals as , was also recorded in early English sources as 'Nonajcoyjicus,' 'Nonocoyecos,' 'Nonacoiacus' and 'Nonaicoics.' According to the personal manuscripts of Justice Samuel Sewall, best known for his controversial role in the Salem witch trials, he was told sometime in 1698 by Hanah, wife of Sachem Ahaton of the Ponkapoag Massachusett tribe, that the name was actually Nunnacoquis (modern Wôpanâak Massachusett dialect Nunahkuqees ) and signified 'an Indian earthen pot' although literally refers to a 'small dry earthen pot.' The name was likely a reference to a series of small mounds along the banks of the Nonacoicus Brook. In addition, portions of Main Street and Sandy Pond Road are believed to follow the vast network of trails used by Native peoples for trade, travel and communication. The Nashaway likely cultivated corn, beans and squash, but depended on foraging for fruits, nuts, tubers and seeds to supplement their diets. Seasonally, camps were set up in hunting areas, but the most important gatherings were likely the annual spawning migrations of Atlantic salmon, alewife, American shad, blueback herring and sea lamprey that once swam up the Nashua River from the sea via the Merrimack River. of Ayer from 1886 by L.R. Burleigh with list of landmarks]] The town of Groton, which originally included Ayer as well as several other towns in the region, was settled by English colonists as early as 1655. The first settlement in the portion of Groton…

Geography

According to the United States Census Bureau, the town has a total area of 9.6 square miles (24.8 km2), of which 9.0 square miles (23.4 km2) is land and 0.6 square mile (1.4 km2) (5.75%) is water. Ayer borders the towns of Shirley, Groton, Littleton, and Harvard.

Read full article on Wikipedia

Excerpted from the corresponding Wikipedia article (CC BY-SA).

Demographics & economy

Geography

Latitude
42.5622
Longitude
-71.5848
Water area
0.06 mi²
View on OpenStreetMap

Coordinates & boundaries from the US Census TIGER/Line shapefiles.

Climate

Current forecast

This Afternoon
67°F
Mostly Sunny
Tonight
45°F
Mostly Cloudy
Saturday
64°F
Mostly Cloudy
Saturday Night
45°F
Cloudy then Slight Chance Light Rain
Sunday
51°F
Light Rain
Sunday Night
51°F
Showers And Thunderstorms

Forecast for Ayer, MA from NOAA NWS API.

Air quality

Industrial & pollution facilities

Natural hazard risk

Health (adults)

High blood pressure
28.1%
Diabetes
8.7%
Adult obesity
27.6%
Binge drinking
18.1%
Adult smoking
13.8%
No leisure activity
21.9%

Age-adjusted prevalence estimates from CDC PLACES (latest release).

Walkability

Amenities nearby

Wildlife & biodiversity

Observations (last 5 yrs, 10 mi)
867,538
Distinct species (top 10)
10

Most-observed species

  • Black-capped Chickadee
    Poecile atricapillus (Linnaeus, 1766) · Aves
    33,501
  • Blue Jay
    Cyanocitta cristata (Linnaeus, 1758) · Aves
    32,479
  • Northern Cardinal
    Cardinalis cardinalis (Linnaeus, 1758) · Aves
    29,652
  • Tufted Titmouse
    Baeolophus bicolor (Linnaeus, 1766) · Aves
    29,510
  • American Robin
    Turdus migratorius Linnaeus, 1766 · Aves
    28,026
  • American Goldfinch
    Spinus tristis (Linnaeus, 1758) · Aves
    26,670
  • Downy Woodpecker
    Dryobates pubescens (Linnaeus, 1766) · Aves
    24,795
  • White-breasted Nuthatch
    Sitta carolinensis Latham, 1790 · Aves
    23,594

Citizen-science & research observations from the Global Biodiversity Information Facility (GBIF).

Schools

Total
42
Elementary
23
Middle
9
High
8
Other
2

Largest nearby schools

  • Acton-Boxborough Regional High
    High · Acton · 1,683 students · 13.7:1 ratio
  • Westford Academy
    High · Westford · 1,525 students · 13.5:1 ratio
  • Raymond J Grey Junior High
    Middle · Acton · 825 students · 11.5:1 ratio
  • North Middlesex Regional
    High · Townsend · 779 students · 13.7:1 ratio
  • Tyngsborough Elementary
    Elementary · Tyngsborough · 752 students · 12.7:1 ratio
  • Nashoba Valley Technical High School
    High · Westford · 750 students · 11.7:1 ratio
  • Groton Dunstable Regional Middle
    Middle · Groton · 723 students · 12.1:1 ratio
  • Groton Dunstable Regional
    High · Groton · 680 students · 12.8:1 ratio

Public K–12 schools within ~10 mi from Urban Institute Education Data Portal (NCES Common Core of Data, 2022).

Earthquake history

Quakes ≥ 2.5 (25 yrs, 62 mi)
11
Largest magnitude
3.8
Largest event
2025-01-27

Most recent

Events from the USGS Earthquake Catalog (global) (FDSN Event Web Service).

Photos

Sights & places nearby

Notable people from here

Geography & sun

Avg solar (kWh/m²/day)
3.81
Annual solar (kWh/m²)
1,392

Elevation, sunrise/sunset and daylight from Open-Meteo. Solar climatology from NASA POWER.

Nearby airports

Public attention

Wikipedia views (last 30 days)
4,287
Avg daily Wikipedia views
143
Attention level
Quiet

Pageview totals from the Wikimedia Pageviews API.

Books about Ayer

Search results from Open Library.

Recent natural events nearby

Ground air-quality sensors

Recently spotted species

Nearest stream gauge

Site
SQUANNACOOK RIVER NEAR WEST GROTON, MA
Distance
6.2 mi
Streamflow
60.2 cfs
Gage height
2.16 ft

Live readings from USGS NWIS · measured 2026-05-22 16:00 UTC.

Events

Geotagged photos within ~6 miles of Ayer, from Wikimedia Commons contributors.

Photos via Wikimedia Commons — see each image page for license & attribution.

Sources

  • Wikipedia
  • NOAA National Weather Service
  • Wikimedia Commons
  • Wikidata
  • USGS Earthquake Catalog (global feed)
  • USGS NWIS (water data)
  • NCES via Urban Institute Education Data Portal
  • GBIF (Global Biodiversity Information Facility)
  • CDC PLACES
  • Open-Meteo / sunrise-sunset.org
  • Wikipedia Pageviews API
  • Open Library