Hallamshire is the name given to an area of South Yorkshire, England. It was the southernmost district of the Anglo-Saxon kingdom of Northumbria. It covers all of the present-day borough of Sheffield, excepting the southern areas formerly in Derbyshire.

Hallamshire is often used as a synonym for Hallam, which has come to mean, broadly speaking, that area of Yorkshire in the foothills of the Peak District and southwest of the River Don. The region includes much of western Sheffield, and the parish of Bradfield.

Sheffield Hallam is a parliamentary constituency in western Sheffield, and is one of the wealthiest areas in Britain.

Sheffield Hallam University is named for the district, but the main university buildings are not in the region, whereas most of the University of Sheffield is.

Settlements in Hallam include:

Bradfield, Broomhill
Crookes
Fulwood
Stannington, Strines
Walkley