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1920 United States Congressional Elections – Iowa

United States Senate – GOP Hold

Albert B. Cummins (R-inc) – 528,49961.42%
Claude R. Porter (D) – 322,01537.42%
H. W. Cowles (FL) – 9,0201.05%
Arthur S. Dowler (SL) – 9330.11%
Total Votes – 860,467100.00%

United States House of Representatives – District 1 – GOP Hold

William F. Kopp (R) – 38,10064.49%
E. W. McManus (D) – 20,97735.51%
Total Votes – 59,077100.00%

United States House of Representatives – District 2 – GOP Hold

Harry E. Hull (R-inc) – 50,16089.05%
F. B. Althouse (FL) – 6,05810.76%
H. J. Murphy (I) – 1070.19%
Total Votes – 56,325100.00%

United States House of Representatives – District 3 – GOP Hold

Burton E. Sweet (R-inc) – 67,85997.17%
Roy Jacobs (FL) – 1,9742.83%
Total Votes – 69,833100.00%

United States House of Representatives – District 4 – GOP Hold

Gilbert N. Haugen (R-inc) – 53,08374.57%
Carl Evans (D) – 18,10425.43%
Total Votes – 71,187100.00%

United States House of Representatives – District 5 – GOP Hold

James W. Good (R-inc) – 58,197100.00%

United States House of Representatives – District 6 – GOP Hold

C. William Ramseyer (R-inc) – 41,64465.91%
O. P. Myers (D) – 21,53834.09%
Total Votes – 63,182100.00%

United States House of Representatives – District 7 – GOP Hold

Cassius C. Dowell (R-inc) – 66,36798.12%
Charles Gay (S) – 1,2721.88%
Total Votes – 67,639100.00%

United States House of Representatives – District 8 – GOP Hold

Horace M. Towner (R-inc) – 49,52299.64%
J. W. Killion (I) – 1780.36%
Total Votes – 49,700100.00%

United States House of Representatives – District 9 – GOP Hold

William R. Green (R-inc) – 48,55882.07%
Hattie T. Harl (I) – 10,60717.93%
Total Votes – 59,165100.00%

United States House of Representatives – District 10 – GOP Hold

Lester J. Dickinson (R-inc) – 67,70096.02%
H. R. Reasoner (FL) – 2,8033.98%
Total Votes – 70,503100.00%

United States House of Representatives – District 11 – GOP Hold

William D. Boies (R-inc) – 64,34269.71%
E. H. Birmingham (D) – 27,95330.29%
Total Votes – 92,295100.00%

Source: Office of the Clerk of the United States House of Representatives