| Election Name: | 1936 Democratic Party presidential primaries |
| Country: | United States |
| Flag Year: | 1912 |
| Type: | primary |
| Ongoing: | no |
| Previous Election: | 1932 Democratic Party presidential primaries |
| Previous Year: | 1932 |
| Next Election: | 1940 Democratic Party presidential primaries |
| Next Year: | 1940 |
| Election Date: | March 10 to May 19, 1936 |
| Color1: | 00308F |
| Candidate1: | Franklin D. Roosevelt |
| Home State1: | New York |
| States Carried1: | 13 |
| Popular Vote1: | 4,814,978 |
| Percentage1: | 92.9% |
| Color2: | F0DC82 |
| Candidate2: | Henry Skillman Breckinridge |
| Home State2: | New York |
| States Carried2: | 1 |
| Popular Vote2: | 136,407 |
| Percentage2: | 2.6% |
| Democratic nominee | |
| Before Election: | Franklin D. Roosevelt |
| After Election: | Franklin D. Roosevelt |
From March 10 to May 19, 1936, voters of the Democratic Party elected delegates to the 1936 Democratic National Convention for the purpose of selecting the party's for president in the 1936 United States presidential election.[1] Incumbent President Franklin D. Roosevelt was selected as the nominee through a series of primary elections and caucuses culminating in the 1936 Democratic National Convention held from June 23 to June 27, 1936, in Philadelphia, Pennsylvania.
Before his assassination, there was a challenge from Louisiana Senator Huey Long. But, due to his untimely assassination, President Roosevelt faced only one primary opponent other than various favorite sons.
| Franklin Roosevelt | Henry Breckinridge | Upton Sinclair | John McGroarty | Joseph Coutremarsh | Uncommitted | Others | ||
| March 10 | New Hampshire (Primary) | 100.00% (15,752) | - | - | - | - | - | - |
| April 7 | Wisconsin (Primary) | 99.96% (401,773) | - | - | - | - | - | 0.04% (154) |
| April 14 | Illinois (Primary) | 99.97% (1,416,411) | - | - | - | - | - | 0.03% (446) |
| Nebraska (Primary) | 100.00% (139,743) | - | - | - | - | - | - | |
| April 28 | Massachusetts (Primary) | 85.85% (W) (51,924) | - | - | - | - | - | 14.15% (W) (8,556) |
| Pennsylvania (Primary) | 95.32% (720,309) | 4.68% (35,351) | - | - | - | - | - | |
| May 4 | Maryland (Primary) | 83.45% (100,269) | 15.11% (18,150) | - | - | - | 1.45% (1,739) | - |
| May 5 | California (Primary) | 82.51% (790,235) | - | 11.08% (106,068) | 6.41% (61,391) | - | - | - |
| South Dakota (Primary) | 100.00% (48,262) | - | - | - | - | - | - | |
| May 12 | Ohio (Primary) | 93.98% (514,366) | 6.02% (32,950) | - | - | - | - | - |
| West Virginia (Primary) | 97.25% (288,799) | - | - | - | 2.75% (8,162) | - | - | |
| May 15 | Oregon (Primary) | 99.77% (88,305) | - | - | - | - | - | 0.24% (208) |
| May 19 | New Jersey (Primary) | 18.94% (W) (11,676) | 81.04% (49,956) | - | - | - | - | 0.02% (14) |
| June 6 | Florida (Primary) | 89.67% (242,906) | - | - | - | 10.33% (27,982) | - | - |
| Legend: | 1st place (popular vote) | 2nd place (popular vote) | 3rd place (popular vote) | Candidate has Withdrawn or Ceased Campaigning | (W) - Votes are Write-In |
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