Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/MA/AYER

Ayer ZIP code, Massachusetts

The ZIP code for Ayer, MA is 01432, and its area code is 978.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
3,098
Area code
978

Mail addressed to Ayer uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

Ayer in numbers

About 3,098 people live in Ayer, in 1,511 households. The median household income is $74,878 a year, 28% below the Massachusetts median of $103,960 (US: $80,734). The median owner-occupied home is valued at $444,600 (21% below the Massachusetts median), and median gross rent is $1,240 a month. The median age is 42.1; 37.7% of adults 25 and over hold a bachelor's degree or higher (47.3% across Massachusetts); the average commute takes 29 minutes.

Population3,098Ayer3,098
Households1,511Ayer1,511
Median age42.1Ayer42.1Massachusetts40.0US 38.9
Median household income$74,878Ayer$74,878Massachusetts$103,960US $80,734
Median home value$444,600Ayer$444,600Massachusetts$562,100US $332,700
Median gross rent$1,240Ayer$1,240Massachusetts$1,762US $1,413
Bachelor's degree or higher37.7%Ayer37.7%Massachusetts47.3%US 35.7%
Mean commute28.6 minAyer28.6 minMassachusetts29.1 minUS 26.4 min
Population density2,336 / sq miAyer2,336 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Ayer CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Ayer

ZIP codes with the USPS city name Ayer
ZIP City Type Population Median income Median home
01432 Ayer , MA Standard 8,521 $101,966 $463,800

Other ZIP codes overlapping Ayer

These ZIP codes cover part of Ayer but are addressed as somewhere else.

ZIP codes overlapping Ayer
ZIP City Type Population Median income Median home
01434 Devens , MA Standard 1,564 $162,143 $577,700

Map of Ayer ZIP codes

01432

The ZIP codes of Ayer, MA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Ayer

The nearest larger towns are Littleton Common (3,289 people, 6.0 mi), Leominster (43,909 people, 9.9 mi) and Clinton (7,658 people, 11 mi).

Towns near Ayer
TownPopulationDistance
Littleton Common 3,289 6.0 mi
Leominster 43,909 9.9 mi
Clinton 7,658 11.2 mi
Maynard 10,712 11.5 mi
Hudson 15,719 11.8 mi
West Concord 5,876 12.0 mi
Fitchburg 41,798 12.1 mi
Nashua, NH 91,294 13.8 mi
Lowell 118,368 14.4 mi
Marlborough 41,647 14.8 mi
Hudson, NH 7,469 15.9 mi
Northborough 6,392 17.6 mi
Pinehurst 6,845 18.0 mi
Framingham 72,399 19.1 mi

More nearby: every ZIP code in Middlesex County · Massachusetts ZIP codes

Cite this page

zipcodes.pro. “Ayer, MA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ma/ayer

Underlying data is public domain or openly licensed — sources, vintages and licences.