County ZIP codes · Maine · FIPS 23003
Aroostook County, ME ZIP Codes
Aroostook County, Maine has 47 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 42 residential and 5 for PO boxes or a single organization. 41 of the residential ones lie mainly in Aroostook County and 1 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $41,528 in 04785 (Van Buren) to $84,042 in 04757 (Mapleton) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Aroostook County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $53,309 and $56,795.
They carry 42 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 42 residential ZIP codes in Aroostook County
41 ZIP codes lie mainly in Aroostook County; 1 more reaches into it from a neighboring county and follows the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 04730 | Houlton | 10,106 | 41 | $62k | $145k | 100% |
| 04736 | Caribou | 9,025 | 57 | $54k | $139k | 100% |
| 04769 | Presque Isle | 8,736 | 115 | $56k | $147k | 100% |
| 04743 | Fort Kent | 4,770 | 29 | $56k | $166k | 100% |
| 04756 | Madawaska | 3,341 | 203 | $56k | $160k | 100% |
| 04742 | Fort Fairfield | 3,309 | 43 | $71k | $161k | 100% |
| 04757 | Mapleton | 2,627 | 13 | $84k | $189k | 100% |
| 04785 | Van Buren | 2,073 | 17 | $42k | $114k | 100% |
| 04750 | Limestone | 1,815 | 23 | $49k | $97k | 100% |
| 04786 | Washburn | 1,599 | 23 | $55k | $115k | 100% |
| 04740 | Easton | 1,433 | 37 | $53k | $164k | 100% |
| 04732 | Ashland | 1,427 | 5 | $50k | $128k | 92% |
| 04758 | Mars Hill | 1,405 | 40 | $65k | $162k | 100% |
| 04747 | Island Falls | 1,316 | 4 | $57k | $120k | 100% |
| 04776 | Sherman | 999 | 10 | $47k | $119k | 100% |
| 04745 | Frenchville | 971 | 34 | $56k | $137k | 100% |
| 04772 | Saint Agatha | 842 | 28 | $75k | $188k | 100% |
| 04739 | Eagle Lake | 825 | 4 | $59k | $215k | 100% |
| 04734 | Blaine | 804 | 20 | $79k | $188k | 100% |
| 04780 | Smyrna Mills | 783 | 5 | $63k | $124k | 100% |
| 04459 | Mattawamkeag | 750 | 10 | $49k | $112k | 51% |
| 04471 | Orient | 730 | 8 | $48k | $160k | 100% |
| 04760 | Monticello | 674 | 9 | $52k | $126k | 100% |
| 04763 | Oakfield | 629 | 18 | $46k | $144k | 100% |
| 04774 | Saint Francis | 624 | 4 | $32k | $100k | 100% |
| 04773 | Saint David | 550 | 14 | $69k | $140k | 100% |
| 04783 | Stockholm | 545 | 7 | $76k | $222k | 100% |
| 04781 | Wallagrass | 528 | 12 | $50k | $190k | 100% |
| 04762 | New Sweden | 494 | 14 | $58k | $165k | 100% |
| 04735 | Bridgewater | 492 | 2 | $65k | $155k | 100% |
| 04733 | Benedicta | 465 | 7 | $59k | $127k | 76% |
| 04779 | Sinclair | 446 | 4 | $74k | $172k | 100% |
| 04746 | Grand Isle | 407 | 11 | $35k | $85k | 100% |
| 04787 | Westfield | 382 | 9 | $54k | $150k | 100% |
| 04768 | Portage | 374 | 4 | $60k | $202k | 100% |
| 04761 | New Limerick | 372 | 20 | $54k | $197k | 100% |
| 04766 | Perham | 326 | 9 | $63k | $118k | 100% |
| 04497 | Wytopitlock | 311 | 1 | $49k | $97k | 83% |
| 04451 | Kingman | 217 | 4 | $32k | $67k | 52% |
| 04764 | Oxbow | 88 | 0 | – | – | 100% |
| 04737 | Clayton Lake | no residents | 0 | – | – | 100% |
Partly in Aroostook County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 04424 | Danforth | 983 | 10 | $49k | $112k | 46% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
6 ZIP codes of Aroostook County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Aroostook | Elsewhere |
|---|---|---|
| 04732 | 92% | Piscataquis County 8% |
| 04424 | 46% | Washington County 54% |
| 04459 | 51% | Penobscot County 49% |
| 04733 | 76% | Penobscot County 24% |
| 04497 | 83% | Penobscot County 17% |
| 04451 | 52% | Penobscot County 48% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 04738 | Crouseville |
| 04741 | Estcourt Station |
| 04744 | Fort Kent Mills |
| 04751 | Limestone |
| 04775 | Sheridan |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Aroostook County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Aroostook County's ZIP codes use 2 prefixes: 044 and 047.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 044 | Eastern, ME (SCF 044) | 5 | 68 |
| 047 | Eastern, ME (SCF 044) | 42 | 44 |
42 of the 44 ZIP codes that start with 047 are Aroostook County's, all sorted at Eastern, ME (SCF 044). The other 2 are 04765 (Patten), 04777 (Stacyville).
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.