| Unit Pref: | Imperial |
| Settlement Type: | Township |
| Official Name: | Bell Plain Township |
| Image Map1: | Map of Illinois highlighting Marshall County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Marshall County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Marshall |
| Leader Title: | Supervisor |
| Established Title: | Established |
| Established Date: | November 6, 1849 |
| Area Total Sq Mi: | 36.9 |
| Area Land Sq Mi: | 36.81 |
| Area Water Sq Mi: | 0.09 |
| Area Water Percent: | 0.24 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 10.9 |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 380 |
| Blank Name: | FIPS code |
| Blank Info: | 17-123-04949 |
Bell Plain Township, Township 29 North, Range 1 West, is located in Marshall County, Illinois. It includes the villages of Pattonsburg and La Rose and is traversed by State Highway 29 and the BNSF Railway.
As of the 2010 census, its population was 400 and it contained 169 housing units.[2]
According to the 2010 census, the township has a total area of, of which (or 99.76%) is land and (or 0.24%) is water.[2]