There are 191,482 acres of farmland in the county. The principal agricultural products are corn, soy beans, oats and winter wheat. Livestock is primarily cattle, hogs, and poultry. Egg production is a very active farm industry.
Minerals produced are stone, sand, and gravel.
Downtown Decatur has 4 city-owned public parking lots. Four shopping plazas are located throughout Decatur. The activities resulting from the fact that Decatur is the County Seat creates a healthy retail trade. Since Decatur is the industrial and trading center of several small communities and is in a thickly populated rural area, there is a wealth of skilled and unskilled labor available. The Decatur Economic Development Commission was formed to facilitate the issuance of non-taxable revenue bonds for industrial expansion and improvement, and was the second commission in the State to provide this system for the establishment of new industry in the community.