Davis is a village in Stephenson County, Illinois, United States. The population was 677 at the 2010 census, up from 662 in 2000.
Davis was founded in the 1850s when the railroad was extended to that point. The village was named for one of its founders, S. J. Davis. A post office has been in operation at Davis since 1858.
Davis is located at 42°25′16″N 89°24′53″W (42.421216, -89.414683).
According to the 2010 census, Davis has a total area of 0.43 square miles (1.11 km2), all land.
As of the census of 2000, there were 662 people, 254 households, and 180 families residing in the village. The population density was 1,546.7 people per square mile (594.4/km2). There were 266 housing units at an average density of 621.5 per square mile (238.8/km2). The racial makeup of the village was 98.64% White, 0.30% African American, 0.15% Asian, 0.15% from other races, and 0.76% from two or more races. Hispanic or Latino of any race were 1.21% of the population.
There were 254 households, out of which 37.8% had children under the age of 18 living with them, 60.2% were married couples living together, 7.1% had a female householder with no husband present, and 29.1% were non-families.