Dame Judith Marjorie Potter DNZM CBE (born 23 August 1942) is a former High Court judge in New Zealand.

[4] She was educated at Epsom Girls' Grammar School, before studying at the University of Auckland from 1960 to 1964, graduating with a Bachelor of Laws degree in 1965.

[7] One such case which prompted a rebuke from the United Nations Human Rights Committee[8] was the criminal conviction of twelve-year-old Emelysifa Jessop for aggravated robbery.

[10] In 2007 Potter jailed website editor Vince Siemer for his continual breaches of a High Court injunction.

On 27 August 2012, Potter was granted the right to retain the title of "The Honourable" for life, in recognition of her service as a judge of the High Court of New Zealand.