
Vernonia
- County:
- Columbia County
- County Seat:
- No
- Area (mi²):
- 1.643
- State:
- Oregon
Vernonia is a city located in Columbia County, Oregon. Vernonia has a 2025 population of 2,455. Vernonia is currently growing at a rate of 0.61% annually and its population has increased by 3.19% since the most recent census, which recorded a population of 2,379 in 2020.
The average household income in Vernonia is $92,666 with a poverty rate of 7.85%. The median age in Vernonia is 38.5 years: 38.6 years for males, and 38.2 years for females.