Tolono is a village in Tolono Township, Champaign County, Illinois, United States. The population was 3,604 at the 2020 census. Its name was fabricated by J.B. Calhoun, land commission of the Illinois Central Railroad, who wrote about it simply: "[I] placed the vowel o three times, thus o-o-o, and filling in with the consonants t-l-n." Geography Tolono is located at (39.986046, -88.259727). According to the history of Champaign County: A surveyor for the Illinois Central who was looking for a division headquarters, surveyed the Tolono area and wrote on a map 'too low, No.' and that became the name of the town established there. Tolono at one time had two or three companies making tile used to drain the land around the town, resulting in swamps on the east side of the town both on the north and south side of the Wabash Railroad. According to the 2021 census gazetteer files, Tolono has a total area of ,all land. Demographics As of the 2020 census there were 3,604 people, 1,150 households, and 789 families residing in the village. The population density was . There were 1,458 housing units at an average density of . The racial makeup of the village was 91.12% White, 1.11% African American, 0.47% Native American, 0.42% Asian, 0.03% Pacific Islander, 1.14% from other races, and 5.72% from two or more races. Hispanic or Latino of any race were 2.61% of the population. There were 1,150 households, out of which 67.13% had children under the age of 18 living with them, 45.57% were married couples living together, 18.09% had a female householder with no husband present, and 31.39% were non-families. 26.96% of all households were made up of individuals, and 6.52% had someone living alone who was 65 years of age or older. The average household size was 3.34 and the average family size was 2.66. The village's age distribution consisted of 26.1% under the age of 18, 12.6% from 18 to 24, 27.6% from 25 to 44, 27% from 45 to 64, and 6.7% who were 65 years of age or older. The median age was 34.6 years. For every 100 females, there were 75.4 males. For every 100 females age 18 and over, there were 70.5 males. The median income for a household in the village was $62,788, and the median income for a family was $92,452. Males had a median income of $55,521 versus