Newton LeGayet Mackay (1832 – May 20, 1886) was a Canadian lawyer and political figure. He represented Cape Breton in the Canadian House of Commons from 1872 to 1878 as a Conservative and then Liberal member.[1]
He was born in Halifax, Nova Scotia,[1] the son of William McKay, and was educated there. Mackay was called to the Nova Scotia bar in 1859 and named a Queen's Counsel in 1872. He ran unsuccessfully for a seat in the Nova Scotia assembly in 1867 and 1871 before he was elected to the House of Commons. Mackay became a Liberal following the Pacific Scandal.[2] After his defeat by Hugh McLeod in 1878, he was an unsuccessful candidate in each subsequent federal election until his death in 1886[1] in Sydney. In 1879, he married Kate Bown. Mackay served as treasurer for Cape Breton County.[3]