Fertile is a city in Polk County, Minnesota, United States. It is part of the "Grand Forks-ND-MN Metropolitan Statistical Area". The population was 842 at the 2010 census.
The annual Polk County Fair is held in Fertile and dates back to 1900. The Polk County Fair is also the main attraction for the town of Fertile during the summer. It holds many competitions for crops, animals, and man made items.
The city was originally built along the Sandhill River for a mill. There was a brick-making factory at the edge of the city that ran for many years and supplied building materials for the growing town. The city was also a center of agriculture and farmers brought their crops to the elevator for shipment around the state. In recent years, the community built a nine-hole golf course that runs along the Sandhill River across the road from the old brick-making factory.