PlainZIP

Smithfield, ME · standard

ZIP Code 04978

Somerset County, Maine - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

799
20/sq mi
$107,917
Median income
$242,800
Median home value
34.7%
Bachelor's or higher

The verdict

Smithfield pairs an upper-quartile household income with above-median home values, in a rural, homeowner-dominated area.

Top 14%
household income, US ZIPs
Top 44%
home value, US ZIPs
20
people per sq mi
89%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 04978 against every reporting US ZIP.

ZIP code 04978 is a sparsely populated ZIP (a standard USPS delivery area) in Smithfield, Somerset County, Maine, home to just 799 residents across 39.2 square miles, a density of 20 people per square mile, in the New York time zone.

ZIP 04978 lands in the middle-income range, with a median household income of $107,917 (47% above the Maine average), while per-capita income is $55,791. Local economic indicators show a 5.8% poverty rate alongside 5.3% unemployment. The typical home here is valued at $242,800 (14% below the state average); renters pay a median of $1,109 monthly, and 88.9% of units are owner-occupied.

A solid share of residents have a four-year degree: 34.7% of adults hold a bachelor's degree or higher, the median age is 55.8, and the average commute is -. To put 04978 in local context, 5 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Somerset County, for a geography-aware comparison.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 04978, Smithfield, ME · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

799

Population

39.2

Area (sq mi)

20

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 04978?

55.8

Median Age

51.1%

Male

48.9%

Female

1.2%

Foreign-Born

White 98.2%
African American 0.0%
Asian 0.2%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 1.2%
Hispanic or Latino 0.7%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$107,917

Median Household Income

+47% vs state

$55,791

Per Capita Income

5.8%

Poverty Rate

5.3%

Unemployment Rate

How ZIP 04978 ranks nationally

Smithfield, ME household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$107,917 Top 14% higher than 86% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 67.9%
Bachelor's Degree or Higher 34.7%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

683

Total Housing Units

413

Occupied Units

270

Vacant Units

2.07

Avg Household Size

Occupancy Type

Owner 88.9%
Renter 11.1%

$242,800

Median Home Value

-14% vs state

$1,109

Median Rent

1983

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 19 business establishments in ZIP 04978, employing approximately 188 people with a combined annual payroll of $9,643,000.

19

Businesses

188

Employees

$9.6M

Annual Payroll

2

Industry Sectors

Industry Establishments % of Total
Construction 6 31.6%
Other services (except public administration) 3 15.8%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 04978 vs 04963 →

ZIP 04978 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 04978 ranks #5 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 04978 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 04978 ranks the highest of 5 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
04963 Oakland, ME 7,238 4.4 mi
04957 Norridgewock, ME 4,265 5.5 mi
04937 Fairfield, ME 6,645 6.2 mi
04918 Belgrade Lakes, ME 349 8.4 mi
04917 Belgrade, ME 2,849 9.9 mi

More ZIP Codes in Somerset County

04976 standard
Skowhegan, ME
Pop: 9,903
04937 standard
Fairfield, ME
Pop: 6,645
04950 standard
Madison, ME
Pop: 4,855
04957 standard
Norridgewock, ME
Pop: 4,265
04967 standard
Pittsfield, ME
Pop: 4,230
04924 standard
Canaan, ME
Pop: 2,275

Related Areas

Somerset County Smithfield, ME Maine

Frequently Asked Questions

What county is ZIP code 04978 in? ▼
ZIP code 04978 (Smithfield) is located in Somerset County, Maine. Somerset County contains multiple ZIP codes, see the full list at /counties/somerset-me.
What is the population of ZIP code 04978? ▼
ZIP code 04978 in Smithfield, ME has a population of 799 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 04978? ▼
The median household income in ZIP 04978 is $107,917, which is 41% above the national average of $76,288.
What is the average home value in ZIP 04978? ▼
The median home value in ZIP 04978 is $242,800, which is 13% below the national average of $278,155.
What is the demographic makeup of ZIP 04978? ▼
The largest racial group in ZIP 04978 is White at 98.2%. Hispanic or Latino residents make up 0.7% of the population.
How many businesses are in ZIP code 04978? ▼
ZIP code 04978 has 19 business establishments employing approximately 188 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 04978? ▼
In ZIP code 04978, 67.9% of residents aged 25+ have a high school diploma or higher, and 34.7% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 04978? ▼
In ZIP code 04978, approximately 88.9% of occupied housing units are owner-occupied and 11.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 04978? ▼
The poverty rate in ZIP code 04978 is 5.8% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.