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 Moderate-density area
- $107,917
- Median income Above-median income area
- $242,800
- Median home value Near-median home value
- 34.7%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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 average Maine ZIP), while per-capita income is $55,791. The poverty rate is 5.8%, with unemployment at 5.3%; those measures add context to the income figure. Median home value is $242,800 (14% below the average Maine ZIP) and median rent is $1,109; 88.9% of occupied homes 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 -. The page also surfaces 5 ZIP codes within roughly 10 miles and 6 more in Somerset County, so 04978 can be compared with both its immediate and county-level context.
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
Who lives in ZIP 04978?
55.8
Median Age
51.1%
Male
48.9%
Female
1.2%
Foreign-Born
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 ZIP avg
$55,791
Per Capita Income
5.8%
Poverty Rate
5.3%
Unemployment Rate
How ZIP 04978 ranks among Maine ZIPs
Smithfield, ME household income vs. every Maine ZIP code
Median household income among 395 reporting Maine ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$107,917 Top 7% higher than 93% of 395 Maine ZIPs
Each bar is a $20K-wide band; taller bars hold more Maine 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
683housing units
683
Total Housing Units
413
Occupied Units
270
Vacant Units
2.07
Avg Household Size
Occupancy Type
$242,800
Median Home Value
-14% vs state ZIP avg
$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.
- 04963
Oakland (04963)
7,238 residents
- 04937
Fairfield (04937)
6,645 residents
- 04957
Norridgewock (04957)
4,265 residents
- 04917 2,849
Belgrade (04917)
2,849 residents
- 04978 799
Smithfield (04978)
799 residents
- 04918 349
Belgrade Lakes (04918)
349 residents
What this shows Among its immediate neighbors, ZIP 04978 ranks #5 by population - useful context the national average alone can't give.
ZIP 04978 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 04978
Smithfield (04978)
$107,917 median income
- 04917
Belgrade (04917)
$88,338 median income
- 04963
Oakland (04963)
$77,708 median income
- 04957
Norridgewock (04957)
$65,931 median income
- 04937
Fairfield (04937)
$63,933 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.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 04978, both outside ME so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Somerset County
Related Areas
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.
Related
Take this with you
What to do with ZIP 04978's numbers, next.
- See how ZIP 04978 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Smithfield, ME ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.