CITY · FL
What county is Miami, FL in?
Miami, FL is mostly in Miami-Dade County. County FIPS code 12086, population 2,686,867 (2023 estimate).
County details
- City
- Miami, Florida
- Primary county
- Miami-Dade County
- FIPS code
- 12086
- County population
- 2,686,867
Some cities extend into more than one county. Miami is placed in the county that contains its center. For a specific address, use the address lookup.
Questions
What county is Miami in?
Miami, FL is mostly in Miami-Dade County.
What is the county seat of Miami-Dade County?
County seats are not part of the data on this site. Check the county’s official website.
Can a city be in two counties?
Yes. Large cities such as Houston and Atlanta cross county lines. The address lookup shows the exact county for any street address.
Sources: U.S. Census Bureau geographic reference files; FCC Area API; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.