Blue Sky Green Field wind farm is a wind farm in Fond du Lac County, Wisconsin. The 10,600-acre (43 km2) farm is located between near Mount Calvary (in the town of Marshfield) in the south with its north edge at the Calumet County border in the town of Calumet. The farm is owned by We Energies. It is the largest operating wind power plant in Wisconsin.

The Blue Sky Green Field wind farm consists of 88 Vestas Wind Systems V82 turbines which have a capacity to produce 145 megawatts of power. They are expected to generate 328 million kilowatt hours annually, which is enough to power 36,000 homes. Each turbine is capable of production 1.65 megawatts of electricity. The turbines are approximately 262 feet (80 m) tall, and reach 397 feet (121 m) tall when the 134-foot (41 m) blade is faced upwards.