Wallington was an ancient hundred in the northeast of the historic county of Surrey, England.

The majority of its area has been absorbed by the growth of London; with its name currently referring to the district of Wallington.

The hundred contained the parishes of Addington, Beddington, Carshalton, Chaldon, Cheam, Coulsdon, Croydon, Mitcham, Morden, Sanderstead, Sutton and Woodmansterne.

[4] The hundreds of England declined in administrative use because of the rise of various ad hoc boards.

Under the Local Government Act 1894, the remainder of the hundred came under the administration of the Croydon Rural District.