- Ayers - formed from South Homer (no date); named for M. P. Ayers, the agent who sold the land
- Brown - formed from East Bend in September, 1869; named for William Brown, an early resident
- Champaign - name changed from West Urbana on April 30, 1860
- Colfax - formed from Tolono (no date); named for Schuler Colfax, Vice President with President Grant
- Compromise - formed from part of Kerr and Rantoul (no date)
- Condit - formed from part of Newcomb on May 8, 1867; named for A. B. condit, the first supervisor
- Crittenden - formed from part of Philo (no date); named for John C. Crittenden, Kentucky governor
- East Bend; named after a bend in the Sangamon River
- Harwood - formed from Ludlow as Sheldon in September, 1869, name changed to Shuck (no date) and to Harwood February 22, 1870; named after Abel Harwood, a legislator
- Hensley - formed from Champaign in September, 1866 with original designation of Grant; changed to Hensley (no date); named for A. P. Hensley, the first supervisor
- Homer
- Kerr - name changed from Middlefork on April 30, 1860; named for Samuel Kerr
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- Ludlow - name changed from Pera in March, 1867
- Mahomet - formed from split of Middletown into Mahomet and Scott (no date)
- Newcomb; named for Ethan Newcomb, an early resident
- Ogden - formed from South Homer (no date)
- Pesotum - formed from part of Sadorus (no date); named for Pesotum, a Potawatomi Indian
- Philo - name changed from Hale on April 30, 1860
- Rantoul
- Raymond - formed from Sidney (no date); named for Nathaniel Raymond, first supervisor
- Sadorus
- Saint Joseph
- Scott - formed from split of Middletown into Scott and Mahomet (no date); named for General Winfield Scott
- Sidney
- Somer - name changed from Pleasant Hill on April 30, 1860; named for Whitman Somers, early settlers [the 's' was later dropped]
- Stanton - formed from St. Joseph (no date); named for Edwin M. Stanton
- Tolono
- Urbana
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