| Unit Pref: | Imperial |
| Settlement Type: | Township |
| Official Name: | Forest City Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Mason |
| Established Title: | Settlement |
| Established Date: | November 5, 1861 |
| Area Total Sq Mi: | 33.31 |
| Area Land Sq Mi: | 33.31 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 15.7 |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 485 |
| Blank Name: | FIPS code |
| Blank Info: | 17-125-26766 |
Forest City Township is located in Mason County, Illinois. As of the 2010 census, its population was 522 and it contained 228 housing units.[2]
According to the 2010 census, the township has a total area of, all land.[2]