Home > MA > Middlesex County > Lowell > Zip 01851

Zip Code 01851 — Lowell, MA

01851 is a ZIP Code associated with Lowell, MA, located within Middlesex. The postal region supports an estimated population of 33,403 residents across Data Pending housing units, with a population density of 3,994.5 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (42.629150, -71.336740)

Data Metric	Local Statistic
Postal / Zip Code	01851
Primary City	Lowell
State / Province	MA
County	Middlesex
Total Population	33,403
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	3,994.5 people/sq mi
Timezone	America/New_York

How 01851 Compares

Metric	ZIP 01851	Middlesex County	MA State Average
Population	33,403	1,629,277	7,043,978
Median Income	Data Pending	N/A	N/A
Population Density	3,994.5 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 01854	Lowell	1.5 mi	30,081	N/A
Zip 01852	Lowell	2.1 mi	37,144	N/A
Zip 01850	Lowell	2.5 mi	17,740	N/A
Zip 01824	Chelmsford	2.8 mi	26,650	N/A
Zip 01863	North Chelmsford	2.8 mi	9,796	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →