Wellington—Grey

| fed-status = defunct | fed-district-number = | fed-created = 1966 | fed-abolished = 1976 | fed-election-first = 1968 | fed-election-last = 1974

Wellington—Grey, renamed Wellington—Grey—Dufferin—Waterloo in 1970, was a federal electoral district represented in the House of Commons of Canada from 1968 to 1979. It was located in the province of Ontario. This riding was created in 1966 from parts of Dufferin—Simcoe, Grey—Bruce, Waterloo North, Wellington South and Wellington—Huron ridings.

Wellington—Grey consisted of:

• the Townships of Amarath, East Luther, Melancthon and East Garafraxa excepting the Town of Orangeville in the County of Dufferin,
• the Town of Durham and the Townships of Artemesia, Egremont, Glenelg, Normanby and Proton in the County of Grey,
• the Townships of Wellesley and Woolwich in the County of Waterloo,
• the Townships of Arthur, West Garafraxa, West Luther, Maryborough, Minto, Nichol, Peel and Pilkington in the County of Wellington, and
• the Town of Palmerston.

The electoral district was abolished in 1976 when it was redistributed between Bruce—Grey, Dufferin—Wellington, Grey—Simcoe, Guelph and Waterloo ridings.