Rockwall County: 129 square miles.
The area of Travis County is 989 square miles.
Texas has a land area of approximately 268,597 square miles.
Shelby County with 755 square miles.
Jackson county is 100.6 square miles
Loudon County, TN: 247 square miles.Loudon County, VA: 521 square miles.
Galveston County, Texas, USA - 873 square miles.
It is about 512 square miles. That is about 1326 square kilometres. It is the smallest county in Northern Ireland and the 6th smallest in all of Ireland.
Brewster County is the largest county in Texas at 6,193 square miles.
The land area of Texas is approximately 262,000 square miles, and Texas has 254 counties, so the average area is slightly over 1000 square miles per county. Brewster County (the largest) is over 6 times that large, while Rockwall (the smallest) is about 1/8 of that.
* Dallas County Arkansas is 668 square miles. * Dallas County Texas 908 square miles.
The smallest county in Utah as far as land area is Davis County. Davis County has 304 square miles of land area and 329 square miles of water. The total area of the county is 634 square miles. Morgan County is the smallest in terms of total area with 611 square miles of area, 609 square miles of land and 2 square miles of water. The above figures come from the U.S. Census Bureau.
Clark County is Idaho's smallest county based on population with a population of 982 as of the 2010 Census. Payette County is Idaho's smallest county based on area with 408 square miles.
As far as square miles - Derby, Connecticut In regards to population - Union, Connecticut
The area of Travis County is 989 square miles.
2,844 square kilometres or 1,098 square miles.
Las Animas County is the largest county in the state of Colorado. 4,775 square miles (12,368 km²)
Wyandotte County is the smallest geographically at 156 square miles. For population it looks like Greeley County with 1,534 people.