Auburn is an Federal mansion in Duncan Park in Natchez, Mississippi. It was designed and constructed by Levi Weeks in 1812, and introduced academic Classical order architecture in the Mississippi territory. Its prominent two-story portico served as a model for the subsequent architectural development of local and nationally important mansions. It was declared a National Historic Landmark in 1974 and a Mississippi Landmark in 1984.

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.