Edward Arthur Lancaster (September 22, 1860 – January 4, 1916) was a Canadian politician.

Born in London, Lancaster was educated at the Public and High Schools of London, Ontario and at Osgoode Hall. He practised law in St. Catharines. In 1885, he married Mary H.C. Pettit. A lawyer by profession, he was first returned to parliament in the general election of 1900 for the Ontario electoral district of Lincoln and Niagara.The Canadian Parliament; biographical sketches and photo-engravures of the senators and members of the House of Commons of Canada. Being the tenth Parliament, elected November 3, 1904 A Conservative, he was re-elected in 1904, 1908, and 1911. He died in office in 1916 in St. Catharines.

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