| Election Name: | 1902 South Dakota gubernatorial election |
| Country: | South Dakota |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1900 South Dakota gubernatorial election |
| Previous Year: | 1900 |
| Next Election: | 1904 South Dakota gubernatorial election |
| Next Year: | 1904 |
| Election Date: | November 4, 1902 |
| Image1: | File:Charles N. Herreid.jpg |
| Nominee1: | Charles N. Herreid |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 48,196 |
| Percentage1: | 64.73% |
| Nominee2: | John W. Martin |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 21,396 |
| Percentage2: | 28.74% |
| Map Size: | 250px |
| Governor of South Dakota | |
| Before Election: | Charles N. Herreid |
| Before Party: | Republican Party (United States) |
| After Election: | Charles N. Herreid |
| After Party: | Republican Party (United States) |
The 1902 South Dakota gubernatorial election was held on November 4, 1902. Incumbent Republican Governor Charles N. Herreid ran for re-election to a second term. He faced former Watertown Mayor John W. Martin, the Fusion nominee who was listed as the Democratic nominee, in the general election. Herreid defeated Martin in a landslide to win his second term.
At the Republican convention in June 1902, Governor Charles N. Herreid was renominated unanimously and without opposition.[1]
As was the case in 1898 and 1900, the Democratic and Populist Parties held separate conventions and then fused together with a common set of nominees. However, this time, the parties agreed that the ticket, though fused, would be listed as the Democratic Party on the ballot.[2] At the conventions, former Watertown Mayor John W. Martin[3] was named as the Fusion nominee.[2]