Sleaford Mere Conservation Park is a protected area associated with Sleaford Mere, a permanent saline lake, located on the Jussieu Peninsula which is on the south eastern tip of Eyre Peninsula in South Australia about 15km south west of Port Lincoln. The conservation park which consists of the lake and a quantity of adjoining land, shares boundaries with the Lincoln National Park on its north and east sides along with a parcel of land to its immediate west. The conservation park was proclaimed in 1969 under the former National Parks and Wildlife Reserves Act 1891-1955, for the purpose of conserving ‘important lake feeding habitat for wader birds.’ It was re-proclaimed under the National Parks and Wildlife Act 1972 in 1972. The conservation park is classified as an IUCN Category III protected area.