William Patrick Jeffries (born 19 September 1945)[1] is a former New Zealand politician of the Labour Party.

He attended Victoria University and graduated with a Bachelor of Laws, after which he became a lawyer at his brother's legal firm.

Later he left New Zealand to work in the United Kingdom, before returning to Wellington and establishing his own law firm.

[6] He represented the Heretaunga electorate from 1981 to 1990, when he was defeated by National candidate Peter McCardle in a swing against Labour.

[7] On 24 February 2012 Jeffries was convicted, along with fellow former Justice Minister Sir Douglas Graham and two other men, of breaching the Securities Act by making untrue statements to investors in his capacity as a director of Lombard Finance.