Madison County followed Adams with a median investment income of $83,676. Lafayette County sat at third with $77,231 income. Mississippi's median investment income is $34,533, according to SmartAsset.

The Mississippi Coast has grown more diverse over the last four years. One group is driving that growth, according to U.S.

A recent study found the top 10 wealthiest counties in the state of Mississippi as well as the most affluent counties in the United States. SmartAsset, a financial advisor guide, ranked the ...