Answer:

Gibson County

in Southwest Indiana produces 12.9 million tons, 33% of the State total coal production.

According to the Indiana Coal Council, Gibson County is the leading coal producer statewide and produces approximately 13 million tons of coal about a third of the 36 million tons produced statewide.

Gibson County Coal, owned by Alliance Resource Partners, recently announced the expansion of their operations in Southwest Indiana. Courier and Press Article

The Economic Development Coalition of Southwest Indiana acts as the umbrella organization for Gibson, Posey, Vanderburgh and Warrick Counties in Southwest Indiana. The Coalition facilitates and coordinates business retention, expansion and attraction activities; and, supports efforts to enhance the business climate through regional capacity building.