Smithfield, ME ZIP code
The ZIP code for Smithfield, Maine is 04978. It is in Somerset County.
- Population in these ZIPs
- 856
- Avg. median income
- $107,900population-weighted
- Typical home value
- $273,200population-weighted
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Smithfield, ME ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 04978 | 856 | $107,917 | $273,200 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Smithfield
- Oakland 6 mi
- Norridgewock 6 mi
- Fairfield 7 mi
- Hinckley 8 mi
- New Sharon 10 mi
- Waterville 10 mi
- Shawmut 10 mi
- Belgrade 11 mi
- Vienna 12 mi
- Skowhegan 12 mi
- Anson 13 mi
- Madison 13 mi
Frequently asked questions
What is the ZIP code for Smithfield, ME?
The ZIP code for Smithfield, ME is 04978.
What county is Smithfield, Maine in?
Smithfield ZIP codes are in Somerset County.