| Election Name: | 1920 Louisiana Democratic gubernatorial primary |
| Country: | Louisiana |
| Type: | presidential |
| Ongoing: | No |
| Previous Election: | 1916 Louisiana gubernatorial election |
| Previous Year: | 1916 |
| Next Election: | 1924 Louisiana gubernatorial election |
| Next Year: | 1924 |
| Election Date: | January 20, 1920 |
| Flag Year: | 1912 |
| Image1: | Image:Portrait of John M. Parker (cropped).jpg |
| Candidate1: | John M. Parker |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 77,868 |
| Percentage1: | 54.24% |
| Candidate2: | Frank Stubbs |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 65,685 |
| Percentage2: | 45.06% |
| Map Size: | 300px |
| Governor | |
| Before Election: | Ruffin G. Pleasant |
| Before Party: | Democratic Party (United States) |
| After Election: | John M. Parker |
| After Party: | Democratic Party (United States) |
The 1920 Louisiana gubernatorial election was held on April 20, 1920. Like most Southern states between the Reconstruction Era and the Civil Rights Movement, Louisiana's Republican Party had virtually no electoral support. This meant that the Democratic Party primary held on January 20 was the real contest over who would be governor. The election resulted in the election of John M. Parker as governor of Louisiana.