The Marlborough City Council is the legislative branch of government for the city of Marlborough, Massachusetts.

Councilors are elected to two-year terms and there is no limit on the number of terms an individual can serve.

Following its incorporation as a city, Marlborough adopted a mayor–council government.

Under Marlborough's Plan B charter, the City Council is responsible for "creating laws, reviewing the annual operating budget, confirmation of mayoral appointments, and providing the necessary balance to the actions of the Executive branch of government.

"[1] The executive branch of government in the city is the mayor of Marlborough.