Johnston County Flag

Johnston County

County Seat:
Smithfield

Johnston County's estimated 2026 population is 264,666 with a growth rate of 2.89% in the past year according to the most recent United States census data. Johnston County is the 9th largest county in North Carolina. The 2010 population was 169,676 and has seen a growth of 55.98% since that time.

264,666
Total Population
334
Population Density (mi²)
9
Population Rank (State)
7.4K 2.89%
Annual Population Growth

Johnston County Population

Demographics

Economics and Income Statistics