Peggy Sattler is a politician in Ontario, Canada. She has been a New Democratic Member of Provincial Parliament of the Legislative Assembly of Ontario representing the riding of London West since 2013.

The Ontario New Democratic Party is a social-democratic political party in Ontario, Canada. The party currently forms the Official Opposition in Ontario following the 2018 general election. It is a provincial section of the federal New Democratic Party. It was formed in October 1961 from the Co-operative Commonwealth Federation and the Ontario Federation of Labour (OFL).