Residential delivery area · Massachusetts
ZIP Code 01541: Princeton, MA
ZIP code 01541 uses the postal name Princeton, Massachusetts and lies entirely in Worcester County (Census 2020 ZIP-county file). About 3,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $158,750 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Princeton · its only residential ZIP
- County
- Worcester County
- Metro area
- Worcester, MA
- House district
- MA-2 119th Congress
- State
- Massachusetts
- Time zone
- Eastern
- Land area
- 35.4 sq mi · 100 people per sq mi
Where is ZIP code 01541?
01541 centers on 42.454°, -71.878° and covers 35.4 square miles of land plus 0.4 of water. It borders 7 ZIP codes: 01564, 01522, 01543, 01452, 01473, 01453, 01420.
The map draws ZIP code areas only. For the streets inside 01541, 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 01541 compare with the rest of Worcester County?
| Measure | 01541 | In Worcester County | In MA |
|---|---|---|---|
| People (ACS 2020-2024) | 3,529 | 63rd of 87 | 378th of 539 |
| Median household income | $159k | not ranked | not ranked |
| Median home value | $521k | 13th of 77 | 230th of 449 |
01541's median household income is not ranked: its 90% margin of error (±$46,102) is more than a quarter of the figure ($158,750). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 54% of 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 01541?
The 2020 Census counted 3,495 people in 01541; the ACS, which samples households over 2020-2024, estimates 3,529. Between the 2010 and 2020 censuses its population grew 2.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,529
- 2020 Census count
- 3,495+2.4% since 2010 (3,413)
- Households
- 1,330
- Median age
- 46.1
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 01541?
Of the 3,529 people the ACS estimates in 01541, 22.2% are under 18 and 20.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (92.8%).
- Under 1822.2%
- 18 to 6456.9%
- 65 and older20.9%
- White, not Hispanic92.8%
- Other or two or more5.0%
- Hispanic or Latino1.8%
- Black, not Hispanic0.3%
- Asian, not Hispanic0.0%
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 01541 earn?
Median household income is $158,750 (ACS 2020-2024). It is not measurably different from 2015-2019 ($166,972 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $158,750±$46,102
- Income per person
- $78,965
- Below the poverty line
- 4.2%
- Unemployed (of the labor force)
- 0.4%
- Adults 25+ with a bachelor's degree
- 59.4%
- Adjusted gross income per tax return, 2022
- $141,5571,880 returns; wages 65% 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 01541?
FHFA's house price index for 01541, built from repeat sales and appraisals of the same homes, rose 92% from 2015 to 2025 and rose 56% from 2020 to 2025, and moved +8.0% in 2025.
- Median home value (owners' estimate)
- $520,500
- Median gross rent
- $897
- Homes owned by their occupants
- 94.3%
- Housing units
- 1,417
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 01541?
74 business establishments had a location in this ZIP code in 2023, 4 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction15
- Administrative and support and waste management and remediation services8
- Professional, scientific, and technical services7
- Other services (except public administration)7
- Retail trade5
- Health care and social assistance5
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 01541?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 01564 | Sterling | 8,183 | $129k | 5.2 mi |
| 01522 | Jefferson | 3,152 | $101k | 5.4 mi |
| 01543 | Rutland | 9,353 | $146k | 6.5 mi |
| 01452 | Hubbardston | 4,371 | $124k | 7.0 mi |
| 01473 | Westminster | 8,374 | $106k | 7.1 mi |
| 01453 | Leominster | 43,851 | $84k | 7.4 mi |
| 01420 | Fitchburg | 41,839 | $73k | 9.6 mi |
| 01583 | West Boylston | 7,606 | $106k | 7.1 mi (near) |
| 01520 | Holden | 16,912 | $148k | 8.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.