Diego Morales is a Guatemalan-American politician from Indiana. A Republican, he is the Secretary of State of Indiana.

The secretary of state of Indiana is one of five constitutional officers originally designated in Indiana's state constitution of 1816. Since 1851, it has been an elected position. The secretary of state oversees four divisions, and is the third highest constitutional office of the state government. The secretary serves as the state's chief election officer, enforces state securities regulations, regulates automobile dealerships in Indiana, and manages the state business services division. The current office holder is Diego Morales.