
Cornelius
- County:
- Washington County
- County Seat:
- No
- Area (mi²):
- 2.339
- State:
- Oregon
Cornelius is a city located in Washington County, Oregon. Cornelius has a 2025 population of 16,440. Cornelius is currently growing at a rate of 4.65% annually and its population has increased by 28.52% since the most recent census, which recorded a population of 12,792 in 2020.
The average household income in Cornelius is $112,258 with a poverty rate of 9.31%. The median age in Cornelius is 35.4 years: 36.3 years for males, and 34.4 years for females.