| City: | Shirley Mills, Maine |
| City Alias: | Greenville |
| Names to Avoid: | Shirley |
| County: | Piscataquis County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:01:05 PM |
| Population: | 251 [See All] |
| Area Code: | 207 |
| Classification: | PO Box |
| Coordinates: | 45.3646, -69.6212 |
| Land Area: | 42.195 sq mi |
| Quick Link: |
Shirley Mills is a small rural community in northern Piscataquis County, Maine, covering 51.6 square miles of forested terrain. The 251 residents live in a settlement pattern that doesn't fit the usual PO Box ZIP profile. Despite its classification as a PO Box ZIP code, mail here is delivered via highway contract route to 110 single-family homes scattered along rural roads.
This isn't a PO Box community at all. The post office doesn't maintain boxes (ActualPOBoxCount: 0), and all 53 delivery points receive mail via a single highway contract carrier route. Streets like West Road (11 addresses), Greenville Road (7 addresses), and vacation-themed lanes like Wilderness Acres and Turtle Point Drive spread across the territory. The P-classification appears to be legacy postal metadata that doesn't match current delivery operations.
The area has strong seasonal character. Of 226 total housing units, only 119 are occupied year-round, with 85 units (37.6%) used for seasonal or recreational purposes. The median age of 54.4 years suggests an older, established population, many likely retired or semi-retired. Street names like Mountain View Lane, Oak Ridge Road, and Windy Hill Road hint at the scenic appeal that draws seasonal residents.
Shirley Mills mail is processed through Greenville, which appears as an accepted mailing alias. The town has just 5 business establishments employing 19 people. Median household income sits at $63,750, with median home values around $216,700. Nearly all residents (92%) are white, and 18.3% work from home. The combination of highway contract delivery, seasonal housing, and older residents creates a quiet rural community where summer camp owners and year-round locals share the same winding roads.
Mail to Shirley Mills can be addressed using either SHIRLEY MILLS, ME 04485 or GREENVILLE, ME 04485. Street addresses receive highway contract delivery.
Street names like Wilderness Acres, Mountain View Lane, and Turtle Point Drive reflect the area's rural, recreational character alongside traditional Maine road names.
ZIP Code 04485 has 251 residents and 119 households (average 2.11 persons per household). The median age is 54.4 years, significantly older than the state (45.1) and significantly older than the nation (38.8). The gender split is 52.6% male and 47.4% female, which is higher than the state male share (49.0%), making this a male-majority area. Largest groups are White (92.0%, much higher than the national average of 61.6%) and American Indian & Alaska Native (1.2%); Hispanic or Latino residents make up 0.0%, which is much lower than the national average (18.7%).
Explore More: Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship
| 2020 Population: | 251Source: Census DHC |
| 2024 ACS Population Estimate: | 205Source: Census ACS |
| 2026 ZC Population Estimate: | 217Source: ZIP-Codes.com |
| Population Density: | 5.9 people per sq mile |
| Average Income: | $63,750Source: Census ACS |
| Households: | 119Source: Census DHC |
| Average House Value: | $216,700Source: Census ACS |
| Persons Per Household: | 2.11Source: Census DHC |
| Average Family Size: | 2.60Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 326 | 320 | 319 | 291 | 255 | 198 | 202 | 208 | 169 | 158 | 174 | 183 | 205 |
| Decennial Census | 233 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 251 | -- | -- | -- |
Median Age: 54.4
Male Median Age: 54.8
Female Median Age: 53.5
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 7 | 10 | 5 | 2 | 4 | 5 | 4 | 8 | 6 | 9 | 7 | 7 | 17 | 15 | 12 | 5 | 5 | 4 |
| Female | 3 | 5 | 6 | 5 | 6 | 6 | 7 | 8 | 7 | 1 | 8 | 6 | 17 | 17 | 8 | 5 | 2 | 2 |
| Total | 10 | 15 | 11 | 7 | 10 | 11 | 11 | 16 | 13 | 10 | 15 | 13 | 34 | 32 | 20 | 10 | 7 | 6 |
| White: | 231 | 97.47% |
| Black: | 0 | 0% |
| Hispanic:* | 0 | 0% |
| Asian: | 0 | 0% |
| American Indian: | 3 | 1.27% |
| Hawaiian: | 0 | 0% |
| Other: | 3 | 1.27% |
| Total: | 237 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 132 | 52.59% | 54.8 years |
| Females: | 119 | 47.41% | 53.5 years |
| Total: | 251 | 100% | 54.4 years |
| Native, born in the United States: | 205 | 100.00% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0.00% |
| Foreign born, naturalized U.S. citizen: | 0 | 0.00% |
| Foreign born, not a U.S. citizen: | 0 | 0.00% |
| Total Population: | 205 | 100% |
| Total Native Population: | 205 | 100.00% |
| Total Foreign-born Population: | 0 | 0.00% |
In 2023, the Median household income is $63,750, which is far less than the national median ($78,538), is up $35,000 (121.7%) since 2011 and above its 2019 pre-pandemic level by $16,071. Family households earn a median of $64,375 versus $61,875 for nonfamily households (a difference of $2,500). By gender, male median income is $60,625 and female is $48,750, which is far less than the national female median ($53,445), with a current gap of $11,875 that has widened from 2011 to 2023. The labor-force participation rate is 67.4%, which is notably higher than the state rate (62.1%). The unemployment rate is 0.9%, which is far lower than the national rate (5.2%). The largest occupation group is Sales (38.3%).
Explore More: Income Over Time Household Income Employment Status By Occupation
| Income Type | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $28,750 | $30,000 | $45,500 | $42,361 | $45,833 | $53,750 | $60,625 | $45,694 | $47,679 | $51,250 | $53,000 | $71,250 | $63,750 |
| Median Family Income | $32,083 | $40,278 | $47,250 | $50,000 | $58,750 | $63,958 | $66,667 | $67,917 | $67,000 | $67,000 | $77,000 | $87,500 | $64,375 |
| Median NonFamily Income | $21,667 | $21,786 | $26,250 | $25,536 | $25,625 | $21,750 | $25,313 | $28,438 | $30,625 | $36,458 | $38,500 | $45,000 | $61,875 |
| Median Male Income | $40,833 | $42,188 | $56,250 | $56,875 | $32,250 | $32,292 | $34,583 | $34,167 | $50,313 | $46,250 | $0 | $58,472 | $60,625 |
| Median Female Income | $35,500 | $28,929 | $27,188 | $28,750 | $31,705 | $32,375 | $34,375 | $35,000 | $34,028 | $34,063 | $35,000 | $46,875 | $48,750 |
| Employed: | 115 | 66.86% |
| Unemployed: | 1 | 0.58% |
| Not In Labor Force: | 56 | 32.56% |
| Total: | 172 | 100% |
| Management, business, science, and arts: | 33 | 28.70% |
| Service: | 9 | 7.83% |
| Sales and Office: | 44 | 38.26% |
| Natural resources, construction, and maintenance: | 22 | 19.13% |
| Production, transportation, and material moving: | 7 | 6.09% |
| Total Civilian Employed Population: | 115 | 100% |
In 2023, the median home value is $216,700, which is well under the national median ($303,400), is up $90,900 (72.26%) since 2011 and above its 2019 pre-pandemic level by $69,800. The median gross rent is $0, which is far less than the state median ($1,084), and above its 2019 pre-pandemic level by $0. Of occupied housing, owners make up 91.11% (58.54% with a mortgage, 41.46% free-and-clear) and renters 8.89% - making this ZIP Code more home ownership than the state and under national rental averages. The vacancy rate is 56.10%, which is far higher than the national rate (10.43%).
Explore More: Compare Home Value Home Value Over Time Rent & Over Time Housing Occupancy
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Home Value | $125,800 | $130,300 | $132,100 | $136,900 | $147,900 | $155,700 | $155,500 | $153,000 | $146,900 | $151,700 | $160,800 | $197,500 | $216,700 |
| Less than $500: | 0 | 0.00% |
| $500 to $999: | 0 | 0.00% |
| $1,000 to $1,499: | 0 | 0.00% |
| $1,500 to $1,999: | 0 | 0.00% |
| $2,000 to $2,499: | 0 | 0.00% |
| $2,500 to $2,999: | 0 | 0.00% |
| $3,000 or more: | 0 | 0.00% |
| No Rent: | 8 | 100.00% |
| Total: | 8 | 100% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Rent | $0 | $0 | $0 | $0 | $0 | $0 | $721 | $0 | $0 | $0 | $0 | $0 | $0 |
| Owner Occupied (with mortgage): | 48 | 53.33% |
| Owner Occupied (free and clear, no mortgage): | 34 | 37.78% |
| Renter Occupied: | 8 | 8.89% |
| Total Occupied Housing Units: | 90 | 100% |
| Occupied Housing Units: | 90 | 43.90% |
| Vacant Housing Units (not graphed): | 115 | 56.10% |
| Total Housing Units: | 205 | 100% |
| Single-Family Units: | 192 | 93.66% |
| Multi-Family Units: | 0 | 0.00% |
| Other Units: | 13 | 6.34% |
| Total Housing Units: | 205 | 100% |
In 2023, 29.20% of adults (25+) have a bachelor's degree or higher, which is on par with the state rate (35.30%). High school or higher is 96.90%, which is far higher than the national rate (89.40%). The uninsured rate is 3.90%, which is far lower than the national rate (8.60%). The share of people in poverty is 0.00%, which is comparable to the national rate (8.70%), down 19.50 percentage points since 2011 and below its 2019 pre-pandemic level by 5.30 percentage points. This points to a pronounced improvement in local conditions - rising incomes, firmer consumer demand, and a stronger tax base. Among residents ages 3+, the largest enrollment group is elementary (42.86%). College enrollment is 42.86%, which is comparable to the national rate (26.70%), meaning the community mirrors broader higher-education participation.
Explore More: Educational Attainment Health Insurance Poverty Over Time School Enrollment
| Less than 9th grade: | 5 | 3.11% |
| 9th to 12th grade, no diploma: | 0 | 0.00% |
| High school graduate (includes equivalency): | 55 | 34.16% |
| Some college, no degree: | 25 | 15.53% |
| Associate's degree: | 29 | 18.01% |
| Bachelor's degree: | 33 | 20.50% |
| Graduate or professional degree: | 14 | 8.70% |
| Total: | 161 | 100% |
| High school or higher: | 156 | 96.89% |
| Bachelor's degree or higher: | 47 | 29.19% |
| Private Insurance: | 146 | 62.13% |
| Public Insurance: | 81 | 34.47% |
| No Insurance: | 8 | 3.40% |
| Total: | 235 | 100% |
| Has Health Insurance: | 227 | 96.60% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 19.5% | 20.2% | 21.2% | 16.3% | 11.3% | 7.0% | 5.0% | 6.0% | 5.3% | 10.5% | 6.8% | 2.0% | 0.0% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 0 | 0.00% |
| Kindergarten: | 0 | 0.00% |
| Elementary school (grades 1-8): | 12 | 42.86% |
| High school (grades 9-12): | 4 | 14.29% |
| College or graduate school: | 12 | 42.86% |
| Total: | 28 | 100% |
| Early Childhood: | 0 | 0.00% |
| K-12 (Primary & Secondary School): | 16 | 57.14% |
ZIP Code 04485 supports both business and residential activity. According to the Business Census (2024), there are 7 business establishments, employing about 17 people with an annual payroll of $988,000. USPS data shows 103 residential mailboxes and 2 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 103Source: USPS |
| # Business Mailboxes: | 2Source: USPS |
| Total Delivery Receptacles: | 103Source: USPS |
| Single Family Delivery Units: | 2Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 7Source: CBP |
| 1st Quarter Payroll: | $173,000Source: CBP |
| Annual Payroll: | $988,000Source: CBP |
| # of Employees: | 17Source: CBP |
ZIP Code 04485 is located in Piscataquis County, Maine, within the Metropolitan Statistical Area (CBSA ) and Maine's 2nd Congressional District. This area has a population of 0 people, about 0.00% of whom live in ZIP Code 04485. It covers 42.195 sq mi of land and a water area of 0.569 sq mi.
| CBSA Name: | --Source: Census |
| CBSA Number: | --Source: Census |
| CBSA Type: | --Source: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 0Source: Census |
| MSA: | Source: Census |
| Land Area: | 42.195 sq miSource: Census |
| Water Area: | 0.569 sq miSource: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 27557.4 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 04485 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on January 1, 2026.