J. and E. Ledger is an engineering company based in Perth, Western Australia. In its early years it was known as Ironfounders, Ironworkers and Tinsmiths. In the 1890s the firm had a factory in William Street. The firm had a foundry utilised for materials for the Goldfields Water Supply Scheme. In 1929 it was located at a premises in 231 Pier Street. In the 1960s the company name had changed to Ledger Engineering.