Tyrrell County is the smallest by population. The population of the county is 4.247.
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.
The smallest county by population in Wyoming is Niobrara County with 2,484 people (2010 US Census).
Smallest county population wise in Ireland is Leitrim 27-28 thousand.
Robertson County
There are 95 counties in Tennessee. Based on population, Shelby County is the largest county in Tennessee with population of 938,069 as of July 1, 2015. Pickett County is the smallest county with population of 5,146 as of July 1, 2015.
According to fedstats.gov, the estimated population of White County, Tennesse, is 24,482.
Rutherford County where it serves as the county seat and has a population of over 100,000.
According to fedstats.gov, the estimated population of Shelby County, Kentucky, is 39,717.
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.
In terms of population the largest is Nairobi, the smallest Lamu county. In terms of size the largest is Turkana County about 77000 km2 the smallest Mombasa
Lake of the Woods County in Minnesota has the smallest population, with an estimated population of around 3,900 people.