Oakland is a city in Coles County, Illinois, United States. The population was 739 at the 2020 census. History Oakland, formerly known as Independence, was platted in 1833. Pioneer doctor and abolitionist Hiram Rutherford moved to Oakland in 1840 to start his practice in the young town. He became a prominent citizen. Rutherford is best known for his involvement in the 1847 Matson Trial, which involved his friend Abraham Lincoln. A Kentucky slave owner, General Robert Matson, annually brought slaves to work on his land near Oakland. One year, a family of slaves ran away from the farm and took refuge with Rutherford and Gideon Ashmore. Matson sued the men for harboring slaves; Rutherford and Ashmore countered that the slaves could not legally be held in a free state. Rutherford attempted to have Lincoln represent him in the case, but Lincoln had already agreed to represent the slave owner. Matson, represented by Lincoln, lost the case in Coles County court. Rutherford's home and office, as well as other historic sites, are maintained and available for tours. Geography Oakland is located at . According to the 2021 census gazetteer files, Oakland has a total area of , of which (or 95.60%) is land and (or 4.40%) is water. Demographics As of the 2020 census there were 739 people, 494 households, and 272 families residing in the city. The population density was . There were 387 housing units at an average density of . The racial makeup of the city was 94.72% White, 0.41% African American, 0.14% Native American, 0.27% Asian, 0.14% Pacific Islander, 0.27% from other races, and 4.06% from two or more races. Hispanic or Latino of any race were 2.17% of the population. There were 494 households, out of which 45.34% had children under the age of 18 living with them, 42.71% were married couples living together, 1.82% had a female householder with no husband present, and 44.94% were non-families. 42.11% of all households were made up of individuals, and 18.22% had someone living alone who was 65 years of age or older. The average household size was 2.93 and the average family size was 2.15. The city's age distribution consisted of 25.0% under the age of 18, 8.1% from 18 to 24, 18.1% from 25 to 44, 28.6% from 45 to 64, and 20.2% who were 65 years of age or older. The median age was 42.1 years.