Usually, the chief executive for a city within the United States of America is referred to as a Mayor.
Generally speaking in most US cities, the title of Mayor is held by a city's chief executive. It's a position requiring an election.
mr. president
Chief Administrator.
President of the United States of America
Chief Executive of the United States
The US Government Chief Executive is the President.
The title of the chief executive or head of the executive branch of the United States is the US President. Barack Obama, a two-term president, is coming to the end of his second term in 2016.
The President is chief executive of the Executive Branch of the US government.
The chief state executive is the governor of the state.
The Governor is the chief executive of each of the US states
the chief executive officer is the person that works for the white house.
This is the president.