Pike County.
Osage County is the largest county in Oklahoma, measuring approximately 2,304 square miles.
what is the largest county in size measuring square miles in illinios
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Pike County with a total area of 789 square miles.
The largest County in Maine is Aroostook, measuring 6,829 square miles.
Kossuth County is the largest county in Iowa by land area, covering approximately 973 square miles.
San Bernardino County is the largest county in California, and all of the continental United States. It has 20,105 square miles.
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Jefferson County, located in Northern Kentucky, is the largest county in the state, with a population of 741,096. Louisville, located in Jefferson County, is the largest city in Kentucky, with a population of 597,337.
Shelby County's total area is 785 square miles including 763 square miles of land area. Shelby County is Tennessee's largest county in area.
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.