| Honorific-Prefix: | The Honourable |
| Jack Pithey | |
| Office: | Acting President of Rhodesia |
| Term Start: | 1 November 1978 |
| Term End: | 5 March 1979 |
| Primeminister: | Ian Smith |
| Predecessor: | Henry Everard |
| Successor: | Henry Everard |
| Office2: | President of the Senate of Rhodesia |
| Term Start2: | 1970 |
| Term End2: | 1 November 1978 |
| Predecessor2: | Office established |
| Successor2: | John Richard Strong[1] |
| Birth Date: | 30 December 1903[2] |
| Birth Place: | Potchefstroom, Colony of the Transvaal (now North West Province, South Africa) |
| Party: | Rhodesian Front |
| Children: | 3, including Tony and David |
Jack William Pithey (30 December 190320 November 1984[3]) was a Rhodesian politician who served as the unrecognised state's Acting President between 1 November 1978 and 5 March 1979.[4] He was also the President of the Senate of Rhodesia from 1970 to 1978[5] [6] having previously been Member of Parliament for the Avondale constituency in north-west Salisbury (now Harare) between 1964 and 1970.
Jack Pithey was born in Potchefstroom in the Transvaal on 30 December 1903; he moved to Rhodesia on 5 September 1923. He was Secretary for Justice and Internal Affairs between 1958 and 1961 during the Federation of Rhodesia and Nyasaland, and later the Secretary for Justice in Rhodesia between 1962 and 1963. He was appointed Commander of the Order of the British Empire in the 1963 New Year Honours.
He married Mary Wood on 1 September 1931; they had two sons and a daughter. Both his sons, Tony and David Pithey, represented Rhodesia in cricket and played Test cricket for South Africa. He died on 20 November 1984, and his Rhodesian estate was subsequently liquidated.