Max Engling defeated incumbent Diego Morales, Jamie Reitenour, and David Shelton to win the Republican Party nomination for Indiana Secretary of State at a June 20, 2026, convention.
Party delegates elected in the primary voted at the convention to determine which candidate would earn the right to run as the party's nominee in the state's secretary of state election on November 3, 2026. Engling won with 53% in a second round of voting after Reitenour was eliminated. Shelton received 39%, and Morales received 8%.
After Engling was the last to join the race in May 2026, U.S. Sen. Jim Banks (R) and Indiana Attorney General Todd Rokita (R) withdrew their endorsements of Morales and endorsed Engling.