Mayors are the chief executive officers of local government units. How are mayors elected?

Answer:
The answer is registered voters.
Explanation: Mayors are the chief executive officers of local government units. They are elected by the registered voters of a city.
Answer:
Depending on the city, the mayor is elected by the city council members or by the registered voters of the city.
Explanation:
The mayor is the leader in most of the municipalities of the United States, such as cities, towns, etc. In the United States, there are several different types of mayors, depending on the local government system. Under the government system of the administrator council, the mayor is the first among equals on the city council, which acts as a legislative body, while executive functions are performed by a designated manager. The mayor may preside over the city council, but lacks special legislative powers. The mayor and the city council serve part-time, with daily administration in the hands of a professional city manager. The system is more common among medium-sized cities of around 25,000 to several hundred thousand, usually rural and suburban municipalities.
In the second form, known as the municipal council government, the mayor's office and the city council are separate offices. Under a strong mayor system, the mayor acts as an elected executive with the city council exercising legislative powers. They can select a chief administrative officer to supervise the different departments. This is the system used in most major cities in the United States, mainly because mayors provide full-time services and have a wide range of supervising services.