Sir Joseph Victor Williams KNZM (born 1961) is a New Zealand lawyer and judge.

[5] In the 1980s, Williams was a musician as a member of the Ngāhiwi Apanui-led band Aotearoa, known for their bilingual Pacific reggae song "Maranga Ake Ai" (1985).

[3][6] Williams contributed to the legal team for the 1985 Treaty of Waitangi claim which led to the adoption of te reo Māori as an official language of New Zealand.

[1][13] Williams is a former Vice-President of the Māori Law Society, and a fellow of the International Academy of Trial Lawyers.

[16][17] In the 2020 New Year Honours, he was appointed a Knight Companion of the New Zealand Order of Merit, for services to the judiciary.