Residential delivery area · Massachusetts
ZIP Code 01720: Acton, MA
ZIP code 01720 uses the postal name Acton, Massachusetts and lies entirely in Middlesex County (Census 2020 ZIP-county file). About 24,000 people live there (Census Bureau, ACS 2020-2024), the more populous of Acton's 2 residential ZIP codes. Median household income is $159,010 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Acton · 2 residential ZIPs
- County
- Middlesex County
- Metro area
- Boston-Cambridge-Newton, MA-NH
- House district
- MA-3 119th Congress
- State
- Massachusetts
- Time zone
- Eastern
- Land area
- 19.6 sq mi · 1,199 people per sq mi
Where is ZIP code 01720?
01720 centers on 42.484°, -71.438° and covers 19.6 square miles of land plus 0.4 of water. It borders 8 ZIP codes: 01718, 01742, 01754, 01719, 01460, 01741, 01775, 01886.
The map draws ZIP code areas only. For the streets inside 01720, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 01720 compare with the rest of Acton?
| Measure | 01720 | In Acton | In Middlesex County | In MA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 23,526 | 1st of 2 | 30th of 83 | 103rd of 539 |
| Median household income | $159k | 1st of 1 | 28th of 78 | 61st of 406 |
| Median home value | $814k | 1st of 1 | 35th of 80 | 85th of 449 |
Its median household income is higher than in 97% of U.S. residential ZIP codes, and it is denser than 80% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 01720?
The 2020 Census counted 23,232 people in 01720; the ACS, which samples households over 2020-2024, estimates 23,526. Between the 2010 and 2020 censuses its population grew 8.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 23,526
- 2020 Census count
- 23,232+8.8% since 2010 (21,361)
- Households
- 9,098
- Median age
- 44.5
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 01720?
Of the 23,526 people the ACS estimates in 01720, 23.2% are under 18 and 17.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (58.2%), then Asian (not Hispanic) (25.8%).
- Under 1823.2%
- 18 to 6459.7%
- 65 and older17.2%
- White, not Hispanic58.2%
- Asian, not Hispanic25.8%
- Other or two or more7.0%
- Black, not Hispanic4.8%
- Hispanic or Latino4.2%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 01720 earn?
Median household income is $159,010 (ACS 2020-2024), the 28th highest of the 78 ranked ZIP codes in Middlesex County. It is not measurably different from 2015-2019 ($173,331 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $159,010
- Income per person
- $81,175
- Below the poverty line
- 3.5%
- Unemployed (of the labor force)
- 4.8%
- Adults 25+ with a bachelor's degree
- 79.3%
- Adjusted gross income per tax return, 2022
- $195,03511,050 returns; wages 73% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 01720?
FHFA's house price index for 01720, built from repeat sales and appraisals of the same homes, rose 71% from 2015 to 2025 and rose 48% from 2020 to 2025, and moved +2.4% in 2025.
- Median home value (owners' estimate)
- $814,300
- Median gross rent
- $1,982
- Homes owned by their occupants
- 74.2%
- Housing units
- 9,264
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 01720?
705 business establishments had a location in this ZIP code in 2023, 18 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services128
- Retail trade94
- Health care and social assistance84
- Other services (except public administration)65
- Construction54
- Administrative and support and waste management and remediation services40
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 01720?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 01718 | Acton | 404 | $104k | 2.7 mi |
| 01742 | Concord | 18,448 | $195k | 4.0 mi |
| 01754 | Maynard | 10,712 | $124k | 4.1 mi |
| 01719 | Boxborough | 5,496 | $145k | 4.2 mi |
| 01460 | Littleton | 10,280 | $150k | 4.5 mi |
| 01741 | Carlisle | 5,239 | $250k+ | 5.4 mi |
| 01775 | Stow | 7,165 | $186k | 5.3 mi |
| 01886 | Westford | 24,690 | $187k | 7.0 mi |
| 01451 | Harvard | 5,487 | $215k | 6.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.