| Official Name: | Buffalo Township |
| Settlement Type: | Township |
| Unit Pref: | Imperial |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Ogle |
| Leader Title: | Supervisor |
| Leader Name: | Phillip Fossler |
| Established Title: | Established |
| Established Date: | November 6, 1849 |
| Area Total Sq Mi: | 33.67 |
| Area Land Sq Mi: | 33.67 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 83.5 |
| Elevation M: | 263 |
| Elevation Ft: | 863 |
| Coordinates: | 41.9856°N -89.57°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP code |
| Postal Code: | 61064 |
| Blank Name: | FIPS code |
| Blank Info: | 17-141-09421 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 2668 |
Buffalo Township is one of twenty-four townships in Ogle County, Illinois, USA. As of the 2010 census, its population was 2,813 and it contained 1,284 housing units.[2]
According to the 2010 census, the township has a total area of, all land.[2] It contains the city of Polo and the unincorporated town of Buffalo Grove.
The township contains these four cemeteries: Buffalo Grove, Fairmount, Reed and Saint Mary's.