In all enough rubbish to fill 400,000 double-decker buses will be produced, the Department for Environment, Food and Rural Affairs said.
Half of the festive waste could be recycled, but more than 80% will be binned, it claimed.
It is calling on people to recycle jars, bottles, cans and unwanted gifts.
Britons will also use 24 million jars of mincemeat, pickle and cranberry sauce, Defra said.
If these glass jars were recycled, it would save enough energy to boil water for 60 million cups of tea, said Environment Minister Elliot Morley.
Further waste is created by the traditional Christmas meal, with around 125,000 tonnes of plastic packaging and 4,200 tonnes of foil expected to be thrown out.
And, once the festive season is over, about six million Christmas trees will be binned, creating more than 9,000 tonnes of waste.