| Place Name | Smithfield |
| Place Type | Town |
| ZIP Code(s) | 04978 |
| County | Somerset County |
| Area Code(s) | 207 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 934 |
| Majority Ethnicity | White 99.01% |
| US Congressional District(s) | Maine 2nd |
| State House Districts | 108 |
| State Senate Districts | 3 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.01% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.99% |