Iowa's 1st congressional district Recent election results Recent election results

| Year_ | Party_Affiliation_1 | Winner | Number_of_Votes_3 | Party_Affiliation_4 | Loser | Number_of_Votes_6 | Percentage_of_Votes_ |
|---|---|---|---|---|---|---|---|
| 1920 | Republican | William F. Kopp | 38100 | Democrat | E.W. McManus | 20977 | 64% - 36% |
| 1922 | Republican | William F. Kopp | 26651 | Democrat | John M. Lindley | 14056 | 65% - 34% |
| 1924 | Republican | William F. Kopp | 42711 | Democrat | James M. Bell | 17110 | 71% - 29% |
| 1926 | Republican | William F. Kopp | 27358 | Democrat | James M. Bell | 11408 | 71% - 29% |
| 1928 | Republican | William F. Kopp | 45806 | N/A | No Opponent | N/A | 100% - 0% |
| 1930 | Republican | William F. Kopp | 27053 | Democrat | Max A. Conrad | 15538 | 63% - 36% |
| 1932 | Democrat | Edward C. Eicher | 55378 | Republican | William F. Kopp | 46738 | 54% - 46% |