Chiswick was a local government district in the county of Middlesex, England from 1858 to 1927.

The Chiswick Improvement Act 1858[1] created a board of 19 commissioners, one of whom was nominated by the Duke of Devonshire, the major landowner of the parish.

The commissioners had power to levy rates for such matters as lighting, paving and sewerage.

[2] In 1883 the commissioners were replaced by a local board (which was also an urban sanitary authority) created under the Public Health Act 1875. the Duke of Devonshire retained the right to nominate a member of the board so long as he continued to hold 500 acres (2.0 km2) in the parish.

The urban district was initially divided into two wards each electing nine councillors named Chiswick and Turnham Green.