Napier was an electorate in the South Australian Legislative Assembly[1] 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.

Some of the more central urbanized area of Napier east of the Main North Road was merged with Little Para which was renamed Elizabeth.

The portion west of Main North Road was transferred to Taylor and Light.

The eastern rural portions became part of King, which the Boundaries Commission reported as the renaming of Napier.

The last member for Napier, Jon Gee, transferred to Taylor.