Harvest is an unincorporated community and census-designated place (CDP) in the northwestern part of Madison County, Alabama, United States, and is included in the Huntsville-Decatur Combined Statistical Area. According to the 2020 U.S. Census, the population of the community is 5,893.

Madison County is located in the north central portion of the U.S. state of Alabama. As of the 2020 Census, the population was 388,153, making it the second-most populous county in Alabama. Its county seat is Huntsville. Since the mid-20th century it has become an area of defense and space research and industry.