The most populated county in the US is Los Angeles County in California with a total population of 9,878,554.
In area, Sweetwater County is the largest county in Wyoming with a total area of 10,491 square miles (27,172 km²), of which 10,425 square miles (27,001 km²) is land and 66 square miles (171 km²) (0.63%) is water. Sweetwater county is also the 8th largest county in the US. By population, the largest county in Wyoming is Laramie County with a population of 91,738 according to the 2010 US Census.
Garvin County Oklahoma
Orange County
The second largest county fair in the US is the Elkhart County 4-H Fair and is located in Goshen, Indiana.
Ulster County is a county in New York State
Rowan County. West Rowan is best.
marinette county in Wisconsin
Which Jefferson county? There are SEVERAL throughout the US..
Miami is a city in the US, in Miami-Dade county (formerly Dade County), in the state of Florida.
There are 3,143 counties and county-equivalents in the US.
No, Jamaica is a separate, sovereign county from the US.