| Office: | County Governor of Oppland |
| Term Start: | 7 November 1900 |
| Term End: | 9 January 1908 |
| Primeminister: | Johannes Steen Otto Blehr Francis Hagerup Christian Michelsen Jørgen Løvland |
| Predecessor: | Jan Greve Skjoldborg |
| Successor: | Sigurd Lambrechts |
| Office2: | Minister of Defence |
| Term Start2: | 17 February 1898 |
| Term End2: | 6 November 1900 |
| Primeminister2: | Johannes Steen |
| Term Start3: | 6 March 1891 |
| Term End3: | 2 May 1893 |
| Primeminister3: | Johannes Steen |
| Predecessor3: | Edvard Hans Hoff |
| Successor3: | Wilhelm Olssøn |
| Office4: | Member of the Norwegian Parliament |
| Term Start4: | 1 January 1895 |
| Term End4: | 31 December 1900 |
| Constituency4: | Nordre Trondhjem |
| Term Start5: | 1 January 1886 |
| Term End5: | 31 December 1891 |
| Constituency5: | Nordre Trondhjem |
| Birth Date: | 7 December 1843 |
| Birth Place: | Trondhjem, Nord-Trøndelag, Sweden-Norway |
| Death Place: | Gjøvik, Oppland, Norway |
| Party: | Liberal |
Peter Theodor Holst (7 December 1843 - 9 January 1908) was a Norwegian politician for the Liberal Party. He was Minister of Defence 1891–1893 and 1898–1900.[1] Holst was an officer by profession, and was made Major General in 1899.[2]