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.
The smallest county in Pennsylvania is Montour County, with an area of around 130 square miles.
McCormick County is the county with the smallest population. The county has a total area of 394 square miles. The population is approximately 9960 residents.
By population, the largest county in Wyoming is Laramie County 91,378 (2010 US Census). The smallest county by population is Niobrara County with 2,484 (2010 US Census). By area, the largest county in Wyoming is Sweetwater County with 10,425.30 square miles. The smallest county in Wyoming by area is Hot Springs County with 2,003.89 square miles.
Grand Isle County- According to the U.S. Census Bureau, the county has a total area of 195 square miles (505.0 km2), the smallest county in Vermont.
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Mitchell County is the second smallest in NC, with 222 sq. miles of land area. It is one square mile larger than the smallest: Clay County. Both are in the mountains of Western, NC and have very low levels of population density. Powell, William S. The North Carolina Gazetteer. Chapel Hill: University of North Carolina Press, 1968. Reprint, 1985.
Based on population, Pickett County is the smallest county with population of 5,146 as of July 1, 2015. Based on area, Trousdale County is the smallest county with 114 square miles.
The smallest country by area east of the Mississippi river is Israel. Its a small country surrounded by larger countries and keeps getting smaller.
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.
Wyandotte County is the smallest county in Kansas in terms of land area. It is located in the northeastern part of the state and is home to the city of Kansas City.
The smallest county in Indiana by both area and population is Ohio County. It occupies 87 square miles, with an estimated population of only 6128 in 2010. It was split off from Dearborn County in 1844.