| Term Start: | 1920 |
| Term End: | 1921 |
| Predecessor: | Position established |
| Successor: | Kristoffer Høgset |
| Office2: | Minister of Agriculture |
| Term Start2: | 26 September 1904 |
| Term End2: | 11 March 1905 |
| Primeminister2: | Francis Hagerup |
| Successor2: | Aasmund H. Vinje |
| Office3: | Member of the Norwegian Parliament |
| Term Start3: | 1 January 1922 |
| Term End3: | 31 December 1930 |
| Birth Name: | Johan Egeberg Mellbye |
| Birth Date: | 11 November 1866 |
| Birth Place: | Christiania, United Kingdoms of Sweden and Norway |
| Death Place: | Nes, Hedmark, Norway |
| Spouse: | Emilie Pettersson |
| Children: | Jan E. Mellbye |
Johan Egeberg Mellbye (11 November 1866 - 17 December 1954) was a Norwegian farmer and politician who served as the first leader of the Norwegian Centre Party from 1920–1921. He also served as Minister of Agriculture 1904–1905, then representing the Conservative Party.
His son Jan E. Mellbye ran the family farm and became chairman of the Norwegian Agrarian Association and Selskapet Ny Jord.[1]