Residential delivery area · Massachusetts
ZIP Code 01851: Lowell, MA
ZIP code 01851 is in Lowell, Massachusetts, entirely in Middlesex County (Census 2020 ZIP-county file). About 33,000 people live there (Census Bureau, ACS 2020-2024), the 2nd most populous of Lowell's 4 residential ZIP codes. Median household income is $92,401 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Lowell · 4 residential ZIPs
- County
- Middlesex County
- Census places
- Lowell
- Neighborhood
- Middlesex Village GeoNames
- Metro area
- Boston-Cambridge-Newton, MA-NH
- House district
- MA-3 119th Congress
- State
- Massachusetts
- Time zone
- Eastern
- Land area
- 3.2 sq mi · 10,345 people per sq mi
- PO Box ZIPs
- 01853 also use the name Lowell
Where is ZIP code 01851?
01851 centers on 42.628°, -71.337° and covers 3.2 square miles of land plus 0.1 of water. It borders 4 ZIP codes: 01854, 01852, 01824, 01863.
The map draws ZIP code areas only. For the streets inside 01851, 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); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 01851 compare with the rest of Lowell?
| Measure | 01851 | In Lowell | In Middlesex County | In MA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 33,403 | 2nd of 4 | 12th of 83 | 44th of 539 |
| Median household income | $92k | 1st of 4 | 72nd of 78 | 288th of 406 |
| Median home value | $467k | 1st of 4 | 72nd of 80 | 279th of 449 |
Its median household income is higher than in 75% of U.S. residential ZIP codes, and it is denser than 98% 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 01851?
The 2020 Census counted 32,691 people in 01851; the ACS, which samples households over 2020-2024, estimates 33,403. Between the 2010 and 2020 censuses its population grew 8.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 33,403
- 2020 Census count
- 32,691+8.3% since 2010 (30,190)
- Households
- 11,421
- Median age
- 36.4
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 01851?
Of the 33,403 people the ACS estimates in 01851, 21.6% are under 18 and 11.5% are 65 or older. The largest group by race and Hispanic origin is Asian (not Hispanic) (41.4%), then White (not Hispanic) (30.8%).
- Under 1821.6%
- 18 to 6466.9%
- 65 and older11.5%
- Asian, not Hispanic41.4%
- White, not Hispanic30.8%
- Hispanic or Latino13.0%
- Black, not Hispanic8.8%
- Other or two or more6.0%
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 01851 earn?
Median household income is $92,401 (ACS 2020-2024), the 72nd highest of the 78 ranked ZIP codes in Middlesex County. It rose from $74,351 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $92,401±$9,825
- Income per person
- $37,712
- Below the poverty line
- 17.9%
- Unemployed (of the labor force)
- 5.7%
- Adults 25+ with a bachelor's degree
- 30.2%
- Adjusted gross income per tax return, 2022
- $59,90416,390 returns; wages 84% 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 01851?
FHFA's house price index for 01851, built from repeat sales and appraisals of the same homes, rose 108% from 2015 to 2025 and rose 54% from 2020 to 2025, and moved +3.6% in 2025.
- Median home value (owners' estimate)
- $467,000
- Median gross rent
- $1,714
- Homes owned by their occupants
- 43.7%
- Housing units
- 11,853
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 01851?
477 business establishments had a location in this ZIP code in 2023, 14 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade78
- Other services (except public administration)61
- Construction56
- Accommodation and food services53
- Health care and social assistance44
- 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 01851?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 01854 | Lowell | 30,081 | $73k | 1.6 mi |
| 01852 | Lowell | 37,144 | $81k | 2.1 mi |
| 01824 | Chelmsford | 26,650 | $140k | 2.7 mi |
| 01863 | North Chelmsford | 9,796 | $145k | 3.1 mi |
| 01850 | Lowell | 17,740 | $70k | 2.6 mi (near) |
| 01862 | North Billerica | 12,129 | $139k | 4.0 mi (near) |
| 01826 | Dracut | 32,629 | $114k | 4.0 mi (near) |
| 01879 | Tyngsboro | 12,550 | $129k | 5.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.