| Office: | Minister of Agriculture |
| Term Start: | 20 March 1935 |
| Term End: | 25 June 1945 |
| Primeminister: | Johan Nygaardsvold |
| Predecessor: | Håkon Five |
| Successor: | Einar Frogner |
| Office2: | Mayor of Sparbu |
| Term Start2: | 1 January 1946 |
| Term End2: | 31 December 1947 |
| Predecessor2: | Erling Moen |
| Successor2: | Harald Nordberg |
| Term Start3: | 1 January 1935 |
| Term End3: | 20 March 1935 |
| Predecessor3: | Fridtjof Rannem |
| Successor3: | Ole K. Nordgård |
| Birth Date: | 19 February 1882 |
| Birth Place: | Sparbu, Steinkjer, Nord-Trøndelag, Sweden-Norway |
| Death Place: | Sparbu, Steinkjer, Nord-Trøndelag, Norway |
| Children: | Ole Martin Ystgaard |
| Party: | Labour |
Hans Ystgaard (19 February 1882 – 25 November 1953) was a Norwegian politician of the Norwegian Labour Party. He served as the Norwegian Minister of Agriculture from 1935 to 1945, and is to date the longest serving minister in said post.[1] In local politics, he served as mayor of Sparbu from January until his appointment as agriculture minister in March 1935, and again from 1946 to 1947.