The largest county is Allen (657sq. mi., 1,702 km²)
Marion County is the largest county in Indiana with an estimated population of 903,393 as of the 2010 U.S. Census. Allen County is the largest county in Indiana with total land area of 657 square miles.
Marion County has the largest county population in Indiana.
The largest is Berkeley County with 1,228 square miles.
The largest is Nye County with 18,147 square miles.
Posey County, Indiana consists of 419 square miles.
375 square miles.
It is Ware County with 903 square miles.
Shelby County with 755 square miles.
Worcester County with 1,513 square miles.
Keweenaw County - 5,966 square miles.
Brewster County is the largest county in Texas at 6,193 square miles.
Indiana at 36,417 square miles.