John Gregory Collinge (born 10 May 1939) is a former New Zealand lawyer, politician and diplomat.
His former roles include president of the New Zealand National Party and High Commissioner to the United Kingdom.
He was president of the Electrical Development Association of New Zealand (1991–1993) and chairman of the National Civil Defence Energy Planning (1992–1993).
[2] He was appointed chairman of the Intergovernmental Committee on the Criteria for Commonwealth Membership, of which New Zealand was independently a member (1996–1997).
He represented New Zealand internationally, including as chairman of the South Pacific Electrical Convention (Sydney, 1981); chairman of Session, World Alcohol & Drug Conference (Glagow, 1992); leader of delegation to People's Republic of China for the National Party (1992); New Zealand representative at the Relief of Warsaw Bi-Centenary (Warsaw, 1995); and head of delegation, European Bank for Redevelopment (Sofia, 1996).