ZIP codes in Middlesex County, Massachusetts

Middlesex County, Massachusetts has 111 ZIP codes in this list, from 01431 to 02495. They cover 78 places, among them Cambridge, Framingham, Lowell and Woburn.

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ZIP code	Place	Land area (sq mi)	Map point
01431	Ashby	23.7	42.675, -71.817
01432	Ayer	8.5	42.559, -71.579
01450	Groton	32.8	42.612, -71.558
01460	Littleton	16.5	42.540, -71.488
01463	Pepperell	22.6	42.669, -71.593
01464	Shirley	15.1	42.573, -71.648
01469	Townsend	21.6	42.653, -71.690
01470	Groton	no area	42.611, -71.575
01471	Groton	no area	42.611, -71.575
01472	West Groton	no area	42.604, -71.627
01474	West Townsend	11.1	42.668, -71.752
01701	Framingham	16.9	42.301, -71.425
01702	Framingham	8.2	42.282, -71.434
01703	Framingham	no area	42.446, -71.459
01704	Framingham	no area	42.446, -71.459
01705	Framingham	no area	42.446, -71.459
01718	Acton	0.1	42.485, -71.433
01719	Boxborough	10.3	42.488, -71.518
01720	Acton	19.6	42.475, -71.448
01721	Ashland	12.3	42.254, -71.458
01730	Bedford	12.4	42.484, -71.277
01731	Hanscom Afb	2.3	42.457, -71.279
01741	Carlisle	15.3	42.529, -71.352
01742	Concord	24.1	42.457, -71.375
01746	Holliston	18.7	42.203, -71.436
01748	Hopkinton	26.2	42.219, -71.530
01749	Hudson	11.5	42.392, -71.561
01752	Marlborough	20.9	42.351, -71.543
01754	Maynard	5.2	42.432, -71.455
01760	Natick	14.8	42.288, -71.357
01770	Sherborn	15.8	42.233, -71.379
01773	Lincoln	13.9	42.422, -71.314
01775	Stow	17.3	42.431, -71.515
01776	Sudbury	24.4	42.384, -71.428
01778	Wayland	15.0	42.349, -71.359
01784	Woodville	no area	42.238, -71.562
01801	Woburn	12.7	42.483, -71.157
01803	Burlington	11.3	42.509, -71.200
01805	Burlington	no area	42.505, -71.196
01813	Woburn	no area	42.479, -71.152
01815	Woburn	no area	42.479, -71.152
01821	Billerica	16.6	42.552, -71.252
01822	Billerica	no area	42.558, -71.269
01824	Chelmsford	18.1	42.591, -71.356
01825	North Reading	no area	42.575, -71.079
01826	Dracut	20.8	42.676, -71.319
01827	Dunstable	16.5	42.674, -71.495
01850	Lowell	1.4	42.656, -71.305
01851	Lowell	3.2	42.632, -71.333
01852	Lowell	5.0	42.634, -71.298
01853	Lowell	no area	42.633, -71.316
01854	Lowell	4.0	42.649, -71.335
01862	North Billerica	9.1	42.576, -71.290
01863	North Chelmsford	4.5	42.635, -71.391
01864	North Reading	13.2	42.582, -71.095
01865	Nutting Lake	no area	42.538, -71.269
01866	Pinehurst	no area	42.529, -71.228
01867	Reading	10.0	42.528, -71.109
01876	Tewksbury	20.8	42.603, -71.223
01879	Tyngsboro	16.8	42.672, -71.416
01880	Wakefield	7.4	42.501, -71.069
01886	Westford	30.2	42.586, -71.440
01887	Wilmington	17.0	42.558, -71.172
01888	Woburn	no area	42.479, -71.152
01889	North Reading	no area	42.572, -71.110
01890	Winchester	6.0	42.453, -71.144
02138	Cambridge	2.7	42.377, -71.126
02139	Cambridge	1.6	42.365, -71.104
02140	Cambridge	1.2	42.393, -71.134
02141	Cambridge	0.6	42.369, -71.084
02142	Cambridge	0.3	42.362, -71.083
02143	Somerville	1.5	42.383, -71.103
02144	Somerville	1.1	42.400, -71.122
02145	Somerville	1.4	42.391, -71.093
02148	Malden	5.0	42.429, -71.061
02149	Everett	3.4	42.411, -71.051
02153	Medford	no area	42.418, -71.106
02155	Medford	8.2	42.417, -71.109
02156	West Medford	no area	42.422, -71.133
02176	Melrose	4.7	42.458, -71.063
02180	Stoneham	6.0	42.483, -71.098
02212	Boston	no area	42.358, -71.060
02238	Cambridge	no area	42.375, -71.106
02420	Lexington	7.0	42.456, -71.217
02421	Lexington	9.6	42.443, -71.227
02451	Waltham	5.3	42.399, -71.245
02452	Waltham	3.8	42.394, -71.218
02453	Waltham	3.6	42.365, -71.232
02454	Waltham	no area	42.357, -71.251
02455	North Waltham	no area	42.362, -71.206
02456	New Town	no area	42.446, -71.459
02458	Newton	2.0	42.353, -71.188
02459	Newton Center	5.0	42.334, -71.183
02460	Newtonville	1.3	42.352, -71.208
02461	Newton Highlands	1.5	42.317, -71.208
02462	Newton Lower Falls	0.7	42.330, -71.256
02464	Newton Upper Falls	0.6	42.313, -71.219
02465	West Newton	2.2	42.349, -71.227
02466	Auburndale	1.6	42.344, -71.248
02467	Chestnut Hill	4.9	42.316, -71.161
02468	Waban	1.5	42.327, -71.231
02471	Watertown	no area	42.371, -71.183
02472	Watertown	4.0	42.370, -71.177
02474	Arlington	3.1	42.420, -71.156
02475	Arlington Heights	no area	42.420, -71.180
02476	Arlington	2.1	42.416, -71.175
02477	Watertown	no area	42.371, -71.183
02478	Belmont	4.6	42.396, -71.179
02479	Waverley	no area	42.388, -71.183
02493	Weston	16.8	42.359, -71.300
02495	Nonantum	no area	42.363, -71.202

The ZIP code areas of Middlesex County add up to about 821 square miles of land (2,125 sq km) as the Census Bureau draws them. The largest is 01450 (Groton), with 32.8 square miles.

Places with more than one code here: Cambridge (6 codes), Framingham (5 codes), Lowell (5 codes).

Using these codes

In an address, the ZIP code comes last, after the city and the two-letter state: Ashby, MA 01431.
Tap a ZIP code to open it in the look-up, with a copy button for the address line.
A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
"No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.

Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.

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