koochiching county with 3,102.36 sq mi
SIZE: The largest Minnesota county by size is St. Louis County (6,226 square miles). POPULATION: The largest Minnesota county by population is Hennepin County (population of 1,116,200).
The second largest county in the lower 48 states is Coconino County in Arizona. It covers an area of about 18,661 square miles.
Shelby is the largest county in Tennessee based both on population and on area. As of the 2010 census, Shelby County had a population of 927,644. Davidson County is the second largest county in Tennessee with a population of 569,891. Shelby County covers an area of 755 square miles. Wayne County is the second largest county based on area with 734 square miles.
In area, Perkins County is the second largest county in South Dakota with a total area of 2,891 square miles. In population, Pennington County is the second largest county in South Dakota with a total population of 100,948 (2010 Census).
The county in Ohio with the most population is Cuyahoga County (Cleveland area) with 1,393,978. Franklin County (Columbus area) is second with 1,118,107.
By square miles:Marquette County is the largest with 1,821 square miles - not including square miles that includes water.Chippewa County is second with 1,561 square miles - not including waterOntonagon County is third with 1,312 square miles - not including waterAll three counties are in the Upper Peninsula of Michigan.
The largest is Berkeley County with 1,228 square miles.
The largest county in square miles in Kansas is Sedgwick County, with an area of approximately 998 square miles.
Pottawattamie County is in the southwest corner of Iowa. The county has a total area of 959 square miles which includes 950 square miles of land. It is the second-largest county in Iowa by area.
The largest is Nye County with 18,147 square miles.
Hennepin County, Minnesota is 606 square miles.
The largest county is Okanagan County, with a total area of 13644 km2 (5315 square miles). Second is Yakima County at 11168 km2 (4312 square miles). Third is Chelan County at 7754 km2 (2994 square miles).