A Sand County Almanac is a 1949 book by American ecologist and environmentalist Aldo Leopold. It was edited and published by his son, Luna, a year after Leopold's death from a heart attack. It is considered to be a landmark book in the conservation movement, describing the lands around Leopold's home in Sauk County, Wisconsin, and his thoughts on developing a "Land Ethic."

The book has had over 2 million copies printed and has been translated into nine languages.