Penobscot County, ME: Cities, ZIP Codes & Population
Penobscot County is a county-level area in Maine identified by the FIPS code 23019. Our data lists 3 places in it, led by Bangor, ME, with combined estimates of about 76,238 people across those places. This page shows its cities, ZIP codes, time zone and neighboring counties.
What are the key facts about Penobscot County?
| County | Penobscot County |
|---|---|
| State | Maine |
| FIPS code | 23019 |
| Places in our data | 3 |
| Places with a city page | 3 |
| Combined place estimates | 76,238 |
| Largest place | Bangor, ME (59,772) |
| Rank in state | 4th of 13 counties by combined place population |
| Weighted density | 826 per sq mi |
| Time zone | Eastern time |
| ZIP codes | 5 |
Which cities and towns are in Penobscot County?
Penobscot County has 3 places large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Bangor, ME is the largest, followed by Brewer, ME.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Bangor, ME | Incorporated | 59,772 | 940 | 2 |
| Brewer, ME | Incorporated | 9,035 | 591 | 1 |
| Old Town, ME | Incorporated | 7,431 | 189 | 2 |
How large is Penobscot County compared with other counties in Maine?
Adding up the estimates for the places in our data gives 76,238 people, which ranks Penobscot County 4th among 13 counties in Maine. The average listed place has about 25,413 residents. The weighted density is about 826 people per square mile, which is small-town or exurban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Penobscot County?
The places in Penobscot County use 5 ZIP codes: 04401, 04402, 04412, 04468, 04489. Every code begins with 0, which is assigned to the Northeast (New England, New Jersey and Puerto Rico). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Penobscot County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Hancock County, ME — about 23 miles southeast (center to center), 8,180 people in listed places
- Waldo County, ME — about 33 miles southwest (center to center), 6,679 people in listed places
- Knox County, ME — about 54 miles south (center to center), 8,616 people in listed places
- Kennebec County, ME — about 61 miles southwest (center to center), 57,204 people in listed places
- Franklin County, ME — about 75 miles west (center to center), 1,513 people in listed places
- Washington County, ME — about 81 miles east (center to center), 4,953 people in listed places
What does the FIPS code 23019 mean?
The first two digits, 23, identify Maine, and the last three, 019, identify Penobscot County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the Maine hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.