Residential delivery area · Massachusetts
ZIP Code 01521: Holland, MA
ZIP code 01521 uses the postal name Holland, Massachusetts and lies entirely in Hampden County (Census 2020 ZIP-county file). About 2,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $91,979 (Census Bureau, ACS 2020-2024). By Census place, 22% of its land lies in Holland (a census-designated place); 78% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Holland · its only residential ZIP
- County
- Hampden County
- Census places
- Holland census-designated place
- Metro area
- Springfield, MA
- House district
- MA-1 119th Congress
- State
- Massachusetts
- Time zone
- Eastern
- Land area
- 12.3 sq mi · 210 people per sq mi
Where is ZIP code 01521?
01521 centers on 42.047°, -72.180° and covers 12.3 square miles of land plus 0.8 of water. It borders 5 ZIP codes: 01081, 01518, 01010, 06076, 01566.
The map draws ZIP code areas only. For the streets inside 01521, 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 01521 compare with the rest of Hampden County?
| Measure | 01521 | In Hampden County | In MA |
|---|---|---|---|
| People (ACS 2020-2024) | 2,583 | 27th of 40 | 404th of 539 |
| Median household income | $92k | 13th of 34 | 291st of 406 |
| Median home value | $334k | 10th of 36 | 400th of 449 |
Its median household income is higher than in 75% of U.S. residential ZIP codes, and it is denser than 63% 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 01521?
The 2020 Census counted 2,603 people in 01521; the ACS, which samples households over 2020-2024, estimates 2,583. Between the 2010 and 2020 censuses its population grew 4.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,583
- 2020 Census count
- 2,603+4.9% since 2010 (2,481)
- Households
- 1,187
- Median age
- 51.9
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 01521?
Of the 2,583 people the ACS estimates in 01521, 15.8% are under 18 and 27.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (86.6%).
- Under 1815.8%
- 18 to 6456.5%
- 65 and older27.8%
- White, not Hispanic86.6%
- Asian, not Hispanic5.0%
- Hispanic or Latino4.7%
- Other or two or more2.1%
- Black, not Hispanic1.7%
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 01521 earn?
Median household income is $91,979 (ACS 2020-2024), the 13th highest of the 34 ranked ZIP codes in Hampden County. It is not measurably different from 2015-2019 ($100,833 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $91,979±$11,542
- Income per person
- $49,966
- Below the poverty line
- 5.9%
- Unemployed (of the labor force)
- 3.9%
- Adults 25+ with a bachelor's degree
- 35.3%
- Adjusted gross income per tax return, 2022
- $81,2971,320 returns; wages 74% 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 01521?
FHFA's house price index for 01521, built from repeat sales and appraisals of the same homes, rose 78% from 2015 to 2025 and rose 48% from 2020 to 2025, and moved −7.2% in 2025.
- Median home value (owners' estimate)
- $333,600
- Median gross rent
- $1,750
- Homes owned by their occupants
- 95.0%
- Housing units
- 1,536
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 01521?
31 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).
- Construction8
- Retail trade4
- Administrative and support and waste management and remediation services4
- Real estate and rental and leasing3
- Professional, scientific, and technical services3
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 01521?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 01081 | Wales | 1,747 | $87k | 3.0 mi |
| 01518 | Fiskdale | 2,598 | $136k | 5.5 mi |
| 01010 | Brimfield | 3,705 | $111k | 5.8 mi |
| 06076 | Stafford Springs, CT | 11,953 | $92k | 6.1 mi |
| 01566 | Sturbridge | 7,362 | $138k | 6.5 mi |
| 01550 | Southbridge | 17,928 | $66k | 7.6 mi (near) |
| 01057 | Monson | 8,176 | $99k | 7.9 mi (near) |
| 06282 | Woodstock Valley, CT | 1,134 | $92k | 8.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.