Lost Nation, Illinois is an unincorporated census-designated place in Ogle County, Illinois, United States, located south of the city of Oregon. As of the 2010 census, its population was 708. Lost Nation has an area of 2.552 square miles (6.61 km2); 2.441 square miles (6.32 km2) of this is land, and 0.111 square miles (0.29 km2) is water.
Lost Nation has a popular golf course, called "Lost Nation Golf Course" that has 18 holes, watered fairways, and a pro shop as well as a cocktail lounge.
Coordinates: 41°54′40″N 89°22′00″W / 41.91111°N 89.36667°W