Elvaston is a village in Hancock County, Illinois, United States. The population was 165 at the 2010 census, an increase from 152 in 2000.Elvaston is located in west-central Hancock County at 40°23′49″N 91°15′1″W / 40.39694°N 91.25028°W / 40.39694; -91.25028. U.S. Route 136 passes through the center of the village, leading east 6 miles to Carthage, the county seat, and west 5 miles to Hamilton on the Mississippi River.According to the 2010 census, Elvaston has a total area of 0.8 square miles, all land.As of the 2000 United States Census, there were 152 people, 67 households, and 45 families residing in the village. The population density was 190.8 people per square mile. There were 71 housing units at an average density of 89.1 per square mile. The racial makeup of the village was 99.34% White and 0.66% African American.There were 67 households out of which 31.3% had children under the age of 18 living with them, 47.8% were married couples living together, 10.