John Rigg MLC CMG (1 November 1858 – 20 October 1943) was a New Zealand politician of the Labour Party.

His family came to New Zealand in 1863 or 1864 and initially settled in Dunedin, before moving to Wellington where Rigg received his education.

Following his father's job loss, Rigg had to leave school aged twelve years to support the family financially.

He describes this and refers to his Scottish noble heritage: 'found in me the makings of a snob and left me a Socialist.'.

[6] Because he refused to condemn the 1913 waterfront strike in Wellington, the Reform Government did not reappoint him to the Legislative Council in 1914.