ZIP codes

ZIP codes in Maine by county

Maine has 427 ZIP codes in its 16 counties. 17 of them cross a county line and 1 cross into a neighboring state. Penobscot County has the most, 47.

By the All Map Tools Team

ZIP codes: 427; With 1% or more of their land in the state
Counties: 16; 4 with a page of their own below
Cross a county line: 17; 1% or more of their land in another county
Cross a state line: 1; 1% or more of their land in another state
County with the most: 47; Penobscot County
Most populated ZIP: 04401; 44,854 people · Bangor

ZIP codes per county in Maine

8–18
19–27
28–38
39–47

Open in the interactive tool

Counties and their ZIP codes

County	Population (2025)	ZIP codes	Shared
Androscoggin County	116,487	14	0
Aroostook County	66,609	42	6
Cumberland County	317,222	38	1
Franklin County	30,824	18	2
Hancock County	57,171	41	2
Kennebec County	129,067	27	1
Knox County	41,117	19	0
Lincoln County	36,595	27	0
Oxford County	60,346	35	4
Penobscot County	157,967	47	7
Piscataquis County	17,409	16	4
Sagadahoc County	37,979	8	0
Somerset County	51,620	26	3
Waldo County	40,693	18	1
Washington County	31,334	31	2
York County	222,434	36	0

Every ZIP code in Maine, by county

A ZIP code that crosses a county line appears in each county it has 1% or more of its land in.

Androscoggin County (14): 04210, 04222, 04236, 04240, 04250, 04252, 04253, 04254, 04256, 04258, 04263, 04274, 04280, 04282
Aroostook County (42): 04424, 04451, 04459, 04471, 04497, 04730, 04732, 04733, 04734, 04735, 04736, 04737, 04739, 04740, 04742, 04743, 04745, 04746, 04747, 04750, 04756, 04757, 04758, 04760, 04761, 04762, 04763, 04764, 04766, 04768, 04769, 04772, 04773, 04774, 04776, 04779, 04780, 04781, 04783, 04785, 04786, 04787
Cumberland County (38): 04003, 04009, 04011, 04015, 04017, 04019, 04021, 04024, 04029, 04032, 04038, 04039, 04040, 04050, 04055, 04057, 04062, 04066, 04069, 04071, 04074, 04079, 04084, 04085, 04091, 04092, 04096, 04097, 04101, 04102, 04103, 04105, 04106, 04107, 04108, 04109, 04110, 04260
Franklin County (18): 04224, 04234, 04239, 04285, 04294, 04936, 04938, 04940, 04947, 04955, 04956, 04964, 04966, 04970, 04982, 04983, 04984, 04992
Hancock County (41): 04408, 04416, 04421, 04429, 04431, 04472, 04476, 04605, 04607, 04609, 04612, 04613, 04614, 04616, 04617, 04622, 04624, 04625, 04627, 04634, 04635, 04640, 04642, 04646, 04650, 04653, 04660, 04662, 04664, 04669, 04673, 04674, 04675, 04676, 04677, 04679, 04681, 04683, 04684, 04685, 04693
Kennebec County (27): 04259, 04265, 04284, 04330, 04344, 04345, 04346, 04347, 04349, 04350, 04351, 04352, 04355, 04358, 04359, 04360, 04363, 04364, 04901, 04910, 04917, 04918, 04926, 04927, 04963, 04988, 04989
Knox County (19): 04547, 04563, 04574, 04645, 04841, 04843, 04847, 04851, 04853, 04854, 04855, 04856, 04858, 04859, 04860, 04861, 04862, 04863, 04864
Lincoln County (27): 04341, 04342, 04348, 04353, 04535, 04537, 04538, 04539, 04541, 04543, 04544, 04551, 04553, 04554, 04555, 04556, 04558, 04564, 04568, 04570, 04571, 04572, 04573, 04575, 04576, 04578, 04852
Oxford County (35): 03579, 04010, 04022, 04037, 04040, 04041, 04051, 04068, 04088, 04216, 04217, 04219, 04220, 04221, 04224, 04226, 04227, 04231, 04237, 04238, 04255, 04257, 04261, 04267, 04268, 04270, 04271, 04275, 04276, 04281, 04286, 04289, 04290, 04292, 04964
Penobscot County (47): 04401, 04410, 04411, 04412, 04417, 04418, 04419, 04422, 04427, 04428, 04429, 04430, 04434, 04435, 04444, 04448, 04449, 04450, 04451, 04453, 04455, 04456, 04457, 04459, 04460, 04461, 04462, 04468, 04469, 04473, 04474, 04475, 04487, 04488, 04489, 04493, 04495, 04497, 04733, 04765, 04777, 04928, 04930, 04932, 04939, 04953, 04969
Piscataquis County (16): 04406, 04414, 04415, 04426, 04441, 04442, 04443, 04462, 04463, 04464, 04478, 04479, 04481, 04485, 04732, 04942
Sagadahoc County (8): 04008, 04086, 04287, 04357, 04530, 04548, 04562, 04579
Somerset County (26): 04478, 04911, 04912, 04920, 04923, 04924, 04925, 04929, 04930, 04937, 04942, 04943, 04944, 04945, 04950, 04957, 04958, 04961, 04965, 04967, 04971, 04975, 04976, 04978, 04979, 04985
Waldo County (18): 04354, 04438, 04496, 04848, 04849, 04915, 04921, 04922, 04941, 04949, 04951, 04952, 04973, 04974, 04981, 04986, 04987, 04988
Washington County (31): 04413, 04424, 04454, 04490, 04491, 04492, 04606, 04611, 04619, 04622, 04623, 04626, 04628, 04630, 04631, 04643, 04648, 04649, 04652, 04654, 04655, 04657, 04658, 04666, 04667, 04668, 04671, 04680, 04686, 04691, 04694
York County (36): 03901, 03902, 03903, 03904, 03905, 03906, 03907, 03908, 03909, 03910, 03911, 04001, 04002, 04005, 04006, 04020, 04027, 04030, 04042, 04043, 04046, 04047, 04048, 04049, 04056, 04061, 04063, 04064, 04072, 04073, 04076, 04083, 04087, 04090, 04093, 04095

Neighboring states

New Hampshire

Tools for Maine

ZIP codes by county or city Any county or city in Maine on an interactive map, with CSV US county map Its counties shaded by population, income or your own data Elevation and places of Maine Its capital, its cities and its highest point, with their elevation

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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