| Election Name: | 1928 Republican Party presidential primaries |
| Country: | United States |
| Flag Year: | 1912 |
| Type: | primary |
| Ongoing: | no |
| Previous Election: | 1924 Republican Party presidential primaries |
| Previous Year: | 1924 |
| Next Election: | 1932 Republican Party presidential primaries |
| Next Year: | 1932 |
| Election Date: | March 6 to May 18, 1928 |
| Color1: | 9e5728 |
| Candidate1: | Herbert C. Hoover |
| Home State1: | California |
| States Carried1: | 8 |
| Popular Vote1: | 2,020,235 |
| Percentage1: | 49.2% |
| Color2: | a59400 |
| Candidate2: | Frank O. Lowden |
| Home State2: | Illinois |
| States Carried2: | 2 |
| Popular Vote2: | 1,283,535 |
| Percentage2: | 31.2% |
| Color3: | 5d73e5 |
| Candidate3: | George W. Norris |
| Home State3: | Nebraska |
| States Carried3: | 2 |
| Popular Vote3: | 259,548 |
| Percentage3: | 6.3% |
| Color4: | 668c63 |
| Candidate4: | James E. Watson |
| Home State4: | Indiana |
| States Carried4: | 1 |
| Popular Vote4: | 228,795 |
| Percentage4: | 5.6% |
| Color5: | 73638c |
| Candidate5: | Guy D. Goff |
| Home State5: | West Virginia |
| States Carried5: | 1 |
| Popular Vote5: | 128,429 |
| Percentage5: | 3.1% |
| Map Size: | 350px |
| Republican nominee | |
| Before Election: | Calvin Coolidge |
| After Election: | Herbert Hoover |
From March 6 to May 18, 1928, voters of the Republican Party chose its nominee for president in the 1928 United States presidential election. The nominee was selected through a series of primary elections and caucuses culminating in the 1928 Republican National Convention held from June 12 to June 15, 1928, in Kansas City, Missouri.[1]
| Candidate | Most recent position | Home state | data-sort-type="date" | Campaign | Popular vote | Contests won | Running mate | ||
|---|---|---|---|---|---|---|---|---|---|
| Herbert C. Hoover | U.S. Secretary of Commerce (1921–1928) | California | (Campaign • Positions) Secured nomination: June 12, 1928 | Charles Curtis | |||||
| Candidate | Most recent position | Home state | data-sort-type="date" | Campaign | Delegates on first ballot | Contests won | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Frank O. Lowden | Governor of Illinois (1917–1921) | Illinois | Defeated at convention: June 12, 1928 | data-sort-value="0" | — | data-sort-value="1" | ||||
| Charles Curtis | U.S. Senator from Kansas (1903–1913, 1915–1929) | Kansas | Defeated at convention: June 12, 1928 (nominated for vice president) | data-sort-value="0" | — | data-sort-value="1" | ||||
| James E. Watson | U.S. Senator from Indiana (1916–1933) | Indiana | Defeated at convention: June 12, 1928 | data-sort-value="0" | — | data-sort-value="1" | ||||
| George W. Norris | U.S. Senator from Nebraska (1916–1943) | Nebraska | Defeated at convention: June 12, 1928 | data-sort-value="0" | — | data-sort-value="1" | ||||
The following candidates stood for nomination in their home states for the purpose of controlling their delegate slate at the convention. They did not receive the first-ballot support of delegates in more than two other states or territories.