Deer Grove is a village in Whiteside County, Illinois, United States.

[2] According to the 2010 census, Deer Grove has a total area of 0.46 square miles (1.19 km2), all land.

The racial makeup of the village was 91.67% White, 2.08% African American, 6.25% from other races.

33.3% of all households were made up of individuals, and 23.8% had someone living alone who was 65 years of age or older.

There were no families and 5.7% of the population living below the poverty line, including no under eighteens and none of those over 64.