| Election Name: | 1904 Delaware gubernatorial election |
| Country: | Delaware |
| Flag Year: | 1904 |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1900 Delaware gubernatorial election |
| Previous Year: | 1900 |
| Next Election: | 1908 Delaware gubernatorial election |
| Next Year: | 1908 |
| Election Date: | November 8, 1904 |
| Nominee1: | Preston Lea |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 22,532 |
| Percentage1: | 51.40% |
| Nominee2: | Caleb S. Pennewill |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 19,780 |
| Percentage2: | 45.13% |
| Map Size: | 210px |
| Governor | |
| Before Election: | John Hunn |
| Before Party: | Republican Party (United States) |
| After Election: | Preston Lea |
| After Party: | Republican Party (United States) |
The 1904 Delaware gubernatorial election was held on November 8, 1904. Though incumbent Republican Governor John Hunn was eligible to run for re-election, he declined to do so. Instead, as the intra-party battle in the Republican Party between the Addicks and anti-Addicks factions continued, Hunn stepped aside to avoid additional conflict.[1] The Addicks, or Union Republicans, nominated Henry C. Conrad for Governor, while the anti-Addicks, or Regular Republicans, held out with their own ticket and nominated Joseph H. Chandler for Governor.[2] On October 12, 1904, the two factions united and agreed to jointly nominate industrialist Preston Lea,[3] a favorite of the Regular Republicans.[4]
In the general election, Lea faced Chandler, the erstwhile candidate of the Regular Republicans, who refused to step aside for Lea and continued his campaign,[5] and former State Senator Caleb S. Pennewill, the Democratic nominee.[6] Lea ended up defeating his opponents by a decisive margin, though somewhat reduced from Hunn's victory in 1900.