Crowmarsh was a rural district in Oxfordshire, England from 1894 to 1932. It was created under the Local Government Act 1894 from the part of the Wallingford rural sanitary district in Oxfordshire. The remainder of the sanitary district was in Berkshire and became the Wallingford Rural District. Crowmarsh Rural District continued to be administered from Wallingford, with meetings held in the workhouse in the town.