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."

Champaign County is a county in the U.S. state of Illinois. As of the 2020 Census, its population was 205,865, making it the 10th-most populous county in Illinois. Its county seat is Urbana.