Napier was an electorate in the South Australian Legislative Assembly in the outer northern suburbs of the Adelaide metropolitan area, including the suburbs of Blakeview, Davoren Park, Elizabeth Downs, Evanston South, Kudla, Munno Para, Smithfield and Smithfield Plains, parts of Craigmore, Evanston Park and Munno Para Downs; as well as semi-rural Bibaringa, One Tree Hill, Sampson Flat, Uleybury and Yattalunga, and part of Humbug Scrub. Wikipedia