D'Lo is a town in Simpson County, Mississippi, United States, along the Strong River. The population was 394 at the 2000 census. Known as Millhaven until 1950, it is part of the Jackson Metropolitan Statistical Area.
The town was featured in Life magazine for sending more men per capita to serve in World War II than any other town of its size; 38 percent of the men who lived in D'Lo served.
In 2016 the town was featured on the UP reality TV series, Small Town, Big Mayor.