Grand Renewable Energy Park will feature 67 Siemens SWT-2.3-101 turbine, alongside 100MW of solar power.
The development is part of a controversial deal struck between the Ontario government and a consortium headed by Samsung. The group pledged to invest C$7 billion (US$6.8 billion) over six years to build factories and develop 2GW of wind farms in the province.
Ontario was forced to drop its feed-in tariff in May after its 50% local-sourcing rules were deemed anti-competitive by the World Trade Organisation, following complaints from the EU, Japan and the US.
The province's government now says it follows a competitive tendering process.
Under the agreement, Siemens will be responsible for delivery, installation and commissioning. The deal also includes a three-year service and maintenance agreement.
Blades for the project will be manufactured at the Siemens facility in Tillsonburg, Ontario, with towers and steel for the turbines also sourced from local suppliers. The nacelles will be supplied by the company's assembly plant in Hutchinson, in the US state of Kansas.
The Grand Renewable project is the second Samsung and Pattern development project in Ontario as part of the green energy investment agreement, under which the developers will sell $6 billion of electricity to the province.
The wind farm is expected to be operational by the third quarter of next year.