Penobscot County GIS Maps
Penobscot County, Maine, has 152,199 residents across 43,437 parcels and covers 3,397.2 square miles. The population declined 1.1% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Penobscot County is 23019.
Bangor is the county's largest population center. Penobscot County also includes 41 zip codes, 33 public school districts and 100 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Penobscot County Trends
- Population
- 152,199▾
- Median Home Value
- $193,800▴
- K-12 Enrollment
- 20,440▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Penobscot County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Penobscot County Parcels
Penobscot County has 43,437 mapped parcels. The median assessed value is $123,500. The median lot size is 0.50 acres. 2,197 parcels are 10 acres or larger. The records carry 23,898 distinct owner names. About 5% of parcels list an owner mailing address outside Maine. Owner names reach 66.6%. Mailing addresses reach 66.6%. Browse the interactive Penobscot County Parcel viewer here.
Penobscot County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 43,437 | 100% |
| Owner name | 28,942 | 66.6% |
| Owner mailing address | 28,934 | 66.6% |
| Site address | 34,952 | 80.5% |
| Land use code | 7,451 | 17.2% |
| Land use description | 0 | 0% |
| Assessed value | 26,750 | 61.6% |
| Land value | 28,943 | 66.6% |
| Improvement value | 28,943 | 66.6% |
| Acreage | 26,255 | 60.4% |
| Parcel boundary | 43,437 | 100% |
| Download all Penobscot County parcels. | ||
Field coverage measured across all Penobscot County parcel records.
Penobscot County Population
Penobscot County had 152,199 residents in 2020. That was 1.1% lower than in 2010. Penobscot County added 7,280 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 45 people per square mile. Some of the county's most populated postal areas include Bangor, Brewer and Hampden.
Population Trend in Penobscot County ME
Penobscot County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Penobscot County Zip Codes
Penobscot County has 41 zip codes. Some of the county's most populated zip codes include Bangor (04401), Brewer (04412) and Hampden (04444). Bangor is the largest zip by population, with about 44,608 residents or 29% of the county total. Together, the three largest zips account for about 42% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Penobscot County ME
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 04401 | Bangor | 44,608 | ▾ -0.6% |
| 04412 | Brewer | 9,672 | ▴ 2% |
| 04444 | Hampden | 9,304 | ▴ 5.4% |
| 04468 | Old Town | 8,801 | ▾ -7.6% |
| 04473 | Orono | 8,070 | ▴ 5.4% |
| Download all zip code data | |||
Penobscot County Zip Code populations and trends per most recent census data.
Penobscot County Demographics
Penobscot County has a median age of 42.5, which makes the county a little younger than Maine overall. About 17.8% of residents are under 18, while 19.8% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 30.8% of the population, which points to a solid working-age base. About 30.5% of adults have a bachelor's degree or higher, above the statewide figure of 35.3%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Penobscot County ME
Median Age
42.5
Under 18
17.8%
Age 65+
19.8%
Bachelor's+
30.5%
Penobscot County School Districts
Penobscot County is served by 33 public school districts with 20,440 students enrolled in 2024. The largest districts on the county map are Bangor, Regional School Unit 22 and Regional School Unit 19. Those three districts account for about 36% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Penobscot County ME
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Bangor | 3,436 | 16.8% | ▴ 0.1% |
| Regional School Unit 22 | 2,118 | 10.4% | ▾ -2.4% |
| Regional School Unit 19 | 1,883 | 9.2% | ▴ 0.6% |
| Brewer | 1,490 | 7.3% | ▾ -4.7% |
| Regional School Unit 34 | 1,369 | 6.7% | ▾ -2.4% |
| Download all school district data | |||
Penobscot County school district enrollment and trends per most recent NCES reporting data.
Penobscot County Housing & Real Estate
Penobscot County has a median home value of $193,800 and a median gross rent of $997. About 70% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Maine median, while rents come in below the state average. In March 2026, the median listing price was $300,000 and homes spent about 100 days on the market.
Penobscot County Housing Mix
Penobscot County housing mix: owner, renter and vacant units.
Penobscot County Housing Trends
Penobscot County median home value and rent trend (last 5 years).
Businesses in Penobscot County, ME
Penobscot County has 7,592 business listings across 781 categories. The largest categories in Penobscot County business listings are Auto Repair (160, 2.1%), Churches & Religious Organizations (139, 1.8%), and Convenience Stores (134, 1.8%). The full Penobscot County business listings dataset includes names, categories, addresses and contact details where available. Penobscot County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Penobscot County, ME
| Category | Businesses | Share |
|---|---|---|
| Auto Repair | 160 | 2.1% |
| Churches & Religious Organizations | 139 | 1.8% |
| Convenience Stores | 134 | 1.8% |
| Gas Stations | 108 | 1.4% |
| Farm | 107 | 1.4% |
| Contractors | 103 | 1.4% |
| Community & Nonprofits | 90 | 1.2% |
| Real Estate Agents | 83 | 1.1% |
| Beauty Salons | 83 | 1.1% |
| Parks & Recreation | 81 | 1.1% |
Penobscot County Business Listings
| Business | Category | City |
|---|---|---|
| Amicus | Abuse And Addiction Treatment | Bangor |
| University of Maine Bookstore | Academic Bookstore | Orono |
| Umo Nrotc | Accommodation | |
| Calculations Inc. | Accountant | Patten |
| University of Maine Men's Hockey | Active Life | Orono |
| Hart Acupuncture & Herbal Medicine | Acupuncture | Bangor |
| Adam & Eve | Adult Entertainment | Bangor |
| Outdoor Cover Warehouse | Adventure Sports Center | Bangor |
| Sign Services Inc | Advertising Agency | Stetson |
| Penobscot Medical Aesthetics | Aesthetician | Bangor |
| Download Penobscot County business listings | ||
Penobscot County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Penobscot County Basemaps
Penobscot County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Penobscot County Data Package
This page shows a preview of what's included in the Penobscot County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for parcels, zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Penobscot County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.