La Rose is a village in Bell Plain Township, Marshall County, Illinois, United States. The population was 144 at the 2010 census, down from 159 in 2000. It is part of the Peoria, Illinois Metropolitan Statistical Area.La Rose is located at 40°58.9′N 89°14.2′W / 40.9817°N 89.2367°W / 40.9817; -89.2367.According to the 2010 census, La Rose has a total area of 0.25 square miles, all land.As of the census of 2000, there were 159 people, 62 households, and 46 families residing in the village. The population density was 722.5 people per square mile. There were 63 housing units at an average density of 286.3 per square mile. The racial makeup of the village was 97.48% White, 0.63% Native American, 1.26% from other races, and 0.63% from two or more races. Hispanic or Latino of any race were 1.26% of the population.There were 62 households out of which 30.6% had children under the age of 18 living with them, 64.5% were married couples living together, 4.