About Marion County
Marion County is a city located in United States, in the Oregon region. According to the latest available data (2026), the population of Marion County is approximately 345,920 residents, making it the #217 most populous city in United States.
Globally, Marion County ranks #5,331 among the world's most populated cities.
Marion County City Statistics
| City | Marion County |
| Country |  United States |
| Population | 345,920 |
| Global Rank | #5,331 |
| Rank in United States | #217 of 867 cities |
| City Category | city |
| Region | Oregon |
| Latitude | 44.91 |
| Longitude | -122.58 |
| Data Year | 2026 |
Where is Marion County Located?
Marion County is located in United States, in the Oregon region, at coordinates 44.91° latitude and -122.58° longitude. Located in the mid-latitudes, Marion County experiences distinct four-season weather patterns.
Nearby Cities
Other Cities in United States
Largest Cities in United States
| # | City | Population |
|---|---|---|
| 1 | Harris County | 4,731,145 |
| 2 | Los Angeles | 3,898,747 |
| 3 | San Diego County | 3,298,634 |
| 4 | Brooklyn | 2,736,074 |
| 5 | Miami-Dade County | 2,701,767 |
Frequently Asked Questions
What is the population of Marion County?
The population of Marion County is approximately 345,920 residents according to the latest available data (2026).
Where is Marion County located?
Marion County is located in United States at approximately 44.91° latitude and -122.58° longitude.
Is Marion County one of the largest cities in United States?
With a population of 345,920, Marion County is one of the notable urban areas in United States. It ranks #217 out of 867 cities in the country.
