The lieutenant governor of Indiana is a constitutional office in the US state of Indiana. Republican Suzanne Crouch, who assumed office January 9, 2017, is the incumbent. The office holder's constitutional roles are to serve as the president of the Indiana Senate, become acting governor during the incapacity of the governor, and become governor should the incumbent governor resign, die in office, or be impeached and removed from office. Lieutenant governors have succeeded ten governors following their deaths or resignations. The lieutenant governor holds statutory positions, serving as the head of the state agricultural and rural affairs bureaus, and as the chairman of several state committees.

The government of Indiana is established and regulated by the Constitution of Indiana. The state-level government consists of three branches: the judicial branch, the legislative branch, and the executive branch. The three branches share power and jointly govern the state of Indiana. County and local governments are also constitutional bodies with limited authority to levy taxes, pass legislation, and create and maintain local public infrastructure.