Foxworth is an unincorporated community and census-designated place in Marion County, Mississippi, United States. As of the 2020 census, it had a population of 523. The community is named after Frank W. Foxworth, who settled the community after moving from the east side of the Pearl River. His father had moved from Marion County, South Carolina, and settleā¦Foxworth is an unincorporated community and census-designated place in Marion County, Mississippi, United States. As of the 2020 census, it had a population of 523. The community is named after Frank W. Foxworth, who settled the community after moving from the east side of the Pearl River. His father had moved from Marion County, South Carolina, and settled near Columbia, 2 miles northeast of Foxworth. The community of Foxworth operated a grist mill, sawmill, and gin.