
Smithfield township
- County:
- Johnston County
- County Seat:
- No
- Area (mi²):
- 65.678
- State:
- North Carolina
Smithfield township is located in Johnston County, North Carolina. Smithfield township has a 2025 population of 20,042. Smithfield township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The average household income in Smithfield township is $74,090 with a poverty rate of 24.89%. The median age in Smithfield township is 39.3 years: 39.7 years for males, and 38.9 years for females.