Zip Code 04978 — Smithfield, ME

ZIP Code 04978 is associated with Smithfield, ME, in Somerset County. The listed population estimate is 856; estimated density is 16.6 people per square mile. Among records with population estimates, it ranks #18 of 25 in Somerset County and #285 of 417 in ME.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (44.634660, -69.807890)

Data MetricLocal Statistic
Postal / Zip Code04978
Primary CitySmithfield
State / ProvinceME
CountySomerset
Total Population856
Population Density16.6 people/sq mi
TimezoneAmerica/New_York

How 04978 Compares

MetricZIP 04978Somerset County recordsME records
Population estimate85650,691 (sum)1,387,734 (sum)
Population Density16.6 /sq mi----
County population rank#18 of 25----
State population rank#285 of 417----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in ME

ZIP CodeCityDistancePopulation estimate
ZIP 04963Oakland4.7 mi7,524
ZIP 04957Norridgewock5.2 mi4,006
ZIP 04937Fairfield6.5 mi6,358
ZIP 04918Belgrade Lakes6.5 miN/A
ZIP 04944Hinckley8.9 mi140

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →