A Mississippi Landmark is a building officially nominated by the Mississippi Department of Archives and History and approved by each county's chancery clerk. The Mississippi Landmark designation is the highest form of recognition bestowed on properties by the state of Mississippi, and designated properties are protected from changes that may alter the property's historic character. Currently there are 890 designated landmarks in the state. Mississippi Landmarks are spread out between eighty-one of Mississippi's eighty-two counties; only Issaquena County has no such landmarks.

Mississippi Department of Archives and History (MDAH) is a state agency founded in 1902. It is the official archive of the Mississippi Government.