In the field of local government in the United States, a consolidated city–county is a city and county that have been merged into one unified jurisdiction. As such, it is simultaneously a city, which is a municipal corporation; and a county, which is an administrative division of a state. Therefore, it has the powers and responsibilities of both types of entities.

A consolidated city-county is different from an independent city, which is a city that is not deemed by its state to be located within the boundaries of any of the state's counties, but is recognized by the state as a separate legal territorial entity, distinct from its surrounding or adjoining counties. However, an independent city can also result from the consolidation of a city and a county. The highest concentration of large consolidated city–county governments in the United States is in the Midwest and upper south, where Indianapolis, Indiana; Nashville, Tennessee; Louisville, Kentucky; Kansas City, Kansas; and Lexington, Kentucky are located.