Delta is a census-designated place and unincorporated community in Clay County, Alabama, United States. Its population was 260 as of the 2020 census.
The climate in Delta is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, this area has a humid subtropical climate, abbreviated "Cfa" on climate maps.
Delta was listed as a census designated place in the 2010 U.S. census.