A city is one of the local governments in Ostrobia. All Ostrobian cities are chartered cities which control itself via the city government, in accordance to the local LGA government and the higher state government. The Ostrobian Local Government Act specifies the structure and powers of the cities.

Cities are entitled to have at least one representative in parliament. The cities are split in to three subgroups: first tier, second tier and third tier. Cities have the power to take, purchase, receive, hold, lease, convey and dispose of real and personal property for its general interests, condemn private property for public use, contract and be contracted, sue and exercise all the powers conferred to it by Parliament. Only an Act of Parliament can create or amend a city charter.