The Inco strike of 1978 (locally referred to as the Sudbury Strike of 1978) was a strike by workers at Inco's operations in Sudbury, Ontario, which lasted from 15 September 1978 until 7 June 1979. It was the longest strike in Inco or Sudbury history until the strike of 2009–10, and at the time broke the record for the longest strike in Canada. It has been noted as one of the most important labour disputes in Canadian history.