Coordinates : 38 ° 52 ′ N 94 ° 52 ′ W \ / 38.867 ° N 94.867 ° W \ / 38.867 ; -94.867 Johnson County ( county code JO ) is a county located in northeast Kansas , in the Central United States .
Coordinates : 38 ° 52 ′ N 94 ° 52 ′ W \ / 38.867 ° N 94.867 ° W \ / 38.867 ; -94.867 Johnson County ( county code JO ) is a county in northeast Kansas .