Rockbridge is a village in Greene County, Illinois, United States. The population was 169 at the 2010 census.Rockbridge is located in southeastern Greene County at 39°16′20″N 90°12′13″W / 39.27222°N 90.20361°W / 39.27222; -90.20361. Illinois Route 267 passes along the eastern edge of the village, leading north 5 miles to Greenfield and south 8 miles to Medora. Carrollton, the Greene County seat, is 13 miles to the northwest via Routes 267 and 108.According to the 2010 census, Rockbridge has a total area of 0.74 square miles, all land.As of the census of 2000, there were 189 people, 84 households, and 63 families residing in the village. The population density was 255.7 people per square mile. There were 89 housing units at an average density of 120.4 per square mile. The racial makeup of the village was 100.00% White. Hispanic or Latino of any race were 0.53% of the population.There were 84 households out of which 25.0% had children under the age of 18 living with them, 61.