ZIP code
01432
Ayer, MA
01432 covers Ayer in Middlesex County, with 8,124 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 01432. Methodology
ZIP code map of 01432

About ZIP code 01432
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 01432. Not ACS. Methodology
People in 01432
Race
- White6,461
- Black or African American368
- American Indian or Alaska Native16
- Asian423
- Native Hawaiian and Pacific Islander4
- Other race246
- Two or more races703
Hispanic or Latino (any race): 514
Age
- Under 10847
- 10 to 19843
- 20 to 29974
- 30 to 391,193
- 40 to 49973
- 50 to 591,350
- 60 to 691,117
- 70 to 79564
- 80 and older360
Income and housing in 01432
Education
- High school graduate90.8%
- Bachelor's degree40.8%
- Graduate degree18.2%
Places covering 01432
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Middlesex County100.0%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
63.3% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 01432
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 6,511 | |
| 2006 | 6,315 | |
| 2007 | 6,731 | |
| 2008 | 6,500 | |
| 2009 | 6,768 | |
| 2010 | 6,806 | |
| 2011 | 6,945 | 6,992 |
| 2012 | 7,105 | 7,150 |
| 2013 | 7,061 | 7,250 |
| 2014 | 7,337 | 7,240 |
| 2015 | 7,489 | 7,280 |
| 2016 | 7,594 | 7,260 |
| 2017 | 7,703 | 7,340 |
| 2018 | 7,762 | 7,440 |
| 2019 | 7,699 | 7,360 |
| 2020 | 7,760 | 7,500 |
| 2021 | 7,912 | 7,410 |
| 2022 | 8,118 | 7,550 |
| 2023 | 8,124 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 01432
12 nearest ZIP centroids (any distance)
- 01434Devens3.1 miPop 1,889 · Income $109,651
- 01450Groton3.2 miPop 11,228 · Income $189,355
- 01464Shirley3.4 miPop 7,017 · Income $121,875
- 01451Harvard4.5 miPop 5,359 · Income $206,607
- 01460Littleton4.8 miPop 10,150 · Income $146,250
- 01719Boxborough6.2 miPop 5,468 · Income $151,000
- 01886Westford7.0 miPop 24,584 · Income $181,523
- 01463Pepperell7.3 miPop 11,693 · Income $126,824
- 01462Lunenburg7.5 miPop 11,822 · Income $109,884
- 01523Lancaster7.7 miPop 8,470 · Income $130,444
- 01718Acton8.0 miPop 528 · Income $125,972
- 01827Dunstable8.5 miPop 3,375 · Income $202,379
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 01432, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
Default is 2 miles. Distances are between ZIP centroids. Widen the radius if nothing is in range.
ZIP code 01432 FAQ
- What city is ZIP code 01432 in?
- 01432 is in Ayer, MA.
- What county is 01432 in?
- 01432 is in Middlesex County.
- What is the median household income in 01432?
- The median household income in 01432 is $105,142.
- Which ZIP codes are near 01432?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 01432.