Simon David Upton is a former New Zealand politician and member of Parliament from 1981 to 2001, representing the National Party, and the current Parliamentary Commissioner for the Environment.

The 1981 New Zealand general election, held on 28 November 1981, was a nationwide vote to determine the shape of the 40th New Zealand Parliament. It saw the governing National Party, led by Robert Muldoon, win a third term in office, but the opposition Labour Party, led by Bill Rowling, won the largest share of the votes cast. Social Credit also won over 20% of the vote – their best result ever – but received no new seats.