| Aspect | Duval County | Jacksonville County |
|---|
| Location | Officially known as Duval County, encompassing Jacksonville and surrounding areas | Often used interchangeably with Jacksonville County, but less formal |
| Government & Services | Provides county-level services, governance, and jurisdiction | Refers to the same geographic area, often in casual contexts |
| Employment & Industry | Government jobs, public services, and local businesses | Same industries, as it covers the same region |
In summary, Duval County is the official name of the county that includes Jacksonville. Jacksonville County is a less formal term often used interchangeably, but Duval County is the correct designation for official and employment purposes.