Rex Harold Johns (21 May 1935 – 17 December 2009) was an Australian rules footballer for the Port Adelaide Football Club in the South Australian National Football League (SANFL).

During an era of dour defence, Johns' ability to score goals at an average 3.37 per game was exceptional.

[1] He was a member of four premiership teams for Port Adelaide.

Rex Johns died after a valiant battle with cancer on the 16 December 2009 at the age of 74.

Rex Johns was the childhood idol of Malcolm Blight.