The County Borough of Leeds, and its predecessor, the Municipal Borough of Leeds, was a local government district in the West Riding of Yorkshire, England, from 1835 to 1974. Its origin was the ancient borough of Leeds, which was reformed by the Municipal Corporations Act 1835. In 1889, when West Riding County Council was formed, Leeds became a county borough outside the administrative county of the West Riding; and in 1893 the borough gained city status. The borough was extended a number of times, expanding from 21,593 acres (8,738 ha) in 1911 to 40,612 acres (16,435 ha) in 1961; adding in stages the former area of Roundhay, Seacroft, Shadwell and Middleton parishes and gaining other parts of adjacent districts. In 1971 Leeds was the fifth largest county borough by population in England. The county borough was abolished in 1974 and replaced with the larger City of Leeds, a metropolitan district of West Yorkshire.

Leeds is a city in West Yorkshire, England. It is the largest settlement in Yorkshire and the administrative centre of the City of Leeds Metropolitan Borough, which is the second most populous district in the United Kingdom. It is built around the River Aire and is in the eastern foothills of the Pennines. The city was a small manorial borough in the 13th century and a market town in the 16th century. It expanded by becoming a major production centre, including of carbonated water, which was invented there in the 1760s, and trading centre for the 17th and 18th centuries.