| Official Name: | Brooklyn Township |
| Settlement Type: | Township |
| Unit Pref: | Imperial |
| Image Map1: | Map of Illinois highlighting Lee County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Lee County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Lee |
| Established Title: | Established |
| Established Date: | November 6, 1849 |
| Leader Title: | Supervisor |
| Leader Name: | Geraldine K. Neal |
| Area Total Sq Mi: | 36.23 |
| Area Land Sq Mi: | 36.22 |
| Area Water Sq Mi: | 0.01 |
| Area Water Percent: | 0.03 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 21.9 |
| Elevation M: | 281 |
| Elevation Ft: | 922 |
| Coordinates: | 41.6722°N -89.1086°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 61318, 61342, 61353, 61378 |
| Blank Name: | FIPS code |
| Blank Info: | 17-103-08654 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 748 |
Brooklyn Township is one of twenty-two townships in Lee County, Illinois, USA. As of the 2010 census, its population was 793 and it contained 358 housing units.[2] In September 1858, Reynolds Township was formed from part of Brooklyn Township.
According to the 2010 census, the township has a total area of, of which (or 99.97%) is land and (or 0.03%) is water.[2]
(This list is based on USGS data and may include former settlements.)
(This town is listed as "historical" by the USGS.)
The township contains these four cemeteries: Brooklyn, Brooklyn Lutheran, Saint Mary's and Union.