 deer grove is a village in whiteside county, illinois, united states. the population was given as 45 in the 2010 census, down from 48 in the 2000 census. ==geography== deer grove is located at  (41.607822, -89.691534). according to the 2010 census, the village has a total area of , all land.{{cite web | url =
Villages_in_Illinois Villages_in_Whiteside_County,_Illinois