Sir John Francis Jeffries (28 March 1929 – 25 January 2019) was a New Zealand local politician, civil servant and later a judge of the High Court.

He failed his School Certificate exam three times and the college rector wrote a reference for Jeffries recommending to prospective employers not to hire him for a job requiring study.

[2] Ahead of the 1968 election, after two terms, Jeffries announced he would not stand for re-election, however he later recanted and stood again successfully.

[9][2] Jeffries was the chairman of the council trading committee, which controlled the city operations in milk delivery, electricity and abattoirs.

A later Wellington mayor, Sir Michael Fowler, later described both the Jeffries brothers as "extremely good" councillors.

That same year he was a signatory of the Citizens for Rowling campaign which urged voters to support Labour in the 1975 election.

He resigned later in the year, following the election, after receiving criticisms from incoming Prime Minister Robert Muldoon over the appointees of the outgoing Labour government.

Later he clarified the previously vague, unsatisfactory definition of the word "welfare" pertaining to child custody cases.

[14] In the 1993 New Year Honours, Jeffries was appointed a Knight Bachelor, for his service to New Zealand's legal system.