Key West
- County:
- Monroe County
- County Seat:
- Yes
- Area (mi²):
- 5.599
- State:
- Florida
Key West is a city located in Monroe County, Florida. Key West has a 2026 population of 25,240. It is also the county seat of Monroe County. Key West is currently declining at a rate of -0.3% annually and its population has decreased by -4.25% since the most recent census, which recorded a population of 26,360 in 2020.