The Feral Hogs are scattered thru out Missouri...seems most are located in the South,Southeast and bordering Arkansas the most.As Rogerstv mentioned a lot of the Hogs are located in the Mark Twain National Forest,which can be a lot of land scattered in thru the Ozarks Regions and lower parts of Missouri.They had a lot of trouble with them in around Piedmont MO.,Lake Wappapello area down Hwy 67 South which in a large Lake Region and again Forest Area's.
We had a few killed around our area here in Southeast Missouri but they are few and far between and with a lot of Private Land scattered around hunting them can be limited.We hunt a large tract of land close to us that is also MTNF and haven't seen one or any signs of any around?