Hillsdale is a village in Rock Island County, Illinois, United States.

[3] At the 2000 census, there were 588 people, 219 households and 157 families living in the village.

The population density was 780.2 per square mile (301.2/km2).

There were 237 housing units at an average density of 314.5 per square mile (121.4/km2).

[5] Of the 219 households, 35.6% had children under the age of 18 living with them, 52.5% were married couples living together, 14.6% had a female householder with no husband present and 28.3% were non-families.