| Unit Pref: | Imperial |
| Settlement Type: | Township |
| Official Name: | Serena Township |
| Image Map1: | Map of Illinois highlighting LaSalle County.svg |
| Mapsize1: | 150px |
| Map Caption1: | LaSalle County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | LaSalle |
| Leader Title: | Supervisor |
| Established Title: | Established |
| Established Date: | May 1850 |
| Area Total Sq Mi: | 37.42 |
| Area Land Sq Mi: | 37.17 |
| Area Water Sq Mi: | 0.25 |
| Area Water Percent: | 0.67 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 30.6 |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 1108 |
| Blank Name: | FIPS code |
| Blank Info: | 17-099-68692 |
Serena Township is located in LaSalle County, Illinois. As of the 2010 census, its population was 1,138 and it contained 459 housing units.[2] Serena Township changed its name from Warren Township in May, 1850.
According to the 2010 census, the township has a total area of, of which (or 99.33%) is land and (or 0.67%) is water.[2]
Serena Township is governed from the Village of Serena. The village has been incorporated since the early 1830s, and the Township Hall is located within town. The township has the Serena Fire Protection District, which serves nearby Northville, Mission, Miller, and Freedom Townships. Community Unit School District No. 2, which serves the area, is also headquartered in Serena, with the main High School for the district, as well as a Middle School and Elementary School located there as well. The township has US Highway 52 running through it as well.