| Election Name: | 1878 Delaware gubernatorial election |
| Country: | Delaware |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1874 Delaware gubernatorial election |
| Previous Year: | 1874 |
| Next Election: | 1882 Delaware gubernatorial election |
| Next Year: | 1882 |
| Election Date: | November 5, 1878 |
| Image1: | HallJohnWood.gif |
| Nominee1: | John W. Hall |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 10,730 |
| Percentage1: | 79.10% |
| Nominee2: | Kensey Johns Stewart |
| Party2: | Greenback Party |
| Popular Vote2: | 2,835 |
| Percentage2: | 20.90% |
| Map Size: | 210px |
| Governor | |
| Before Election: | John P. Cochran |
| Before Party: | Democratic Party (United States) |
| After Election: | John W. Hall |
| After Party: | Democratic Party (United States) |
The 1878 Delaware gubernatorial election was held on November 5, 1878. Incumbent Democratic Governor John P. Cochran was unable to seek re-election. Former State Senator John W. Hall ran as the Democratic nominee to succeed Cochran. The Republican Party, chastened by its long string of defeats, failed to run a statewide candidate. Instead, the Greenback Party stepped in, and Kensey Johns Stewart ran as the Greenback nominee. The absence of the Republican Party on the ballot caused turnout to crash, and Hall defeated Stewart by the largest margin in state history.[1]