1974Final results
1974 Democratic primary for Oklahoma House District 1
Oklahoma House of Representatives · Oklahoma
Mike Murphy (D) won with 75.7% of the vote, defeating Harry S. Costilow (D) by 51.3 points.
Mike MurphyDemocrat · winner · incumbent
75.7%6,210
Harry S. CostilowDemocrat
24.3%1,997
8,207 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET