Warren is a village in Jo Daviess County, Illinois, United States.

[4] Captain Alexander Burnett was the first known American settler in present-day Warren; he built a log cabin at the corner of what is now the corner of Main and Water Streets in 1843.

[5] According to the 2010 census, Warren has a total area of 0.97 square miles (2.51 km2), all land.

30.1% of all households were made up of individuals, and 19.1% had someone living alone who was 65 years of age or older.

The Village of Warren holds "The Pumpkin Festival" every year on the last weekend of September.

The festival includes a large parade, arts and crafts, and fall produce.