| Official Name: | Crescent Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Iroquois County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Iroquois County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Iroquois |
| Established Title: | Established |
| Established Date: | September 17, 1868 |
| Area Total Sq Mi: | 36.42 |
| Area Land Sq Mi: | 36.42 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2020 |
| Population Total: | 567 |
| Population Density Sq Mi: | auto |
| Elevation M: | 198 |
| Elevation Ft: | 650 |
| Coordinates: | 40.7278°N -87.8219°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 60928, 60938, 60953, 60955, 60970 |
| Blank Name: | FIPS code |
| Blank Info: | 17-075-17367 |
| Unit Pref: | Imperial |
Crescent Township is one of twenty-six townships in Iroquois County, Illinois, USA. As of the 2020 census, its population was 567 and it contained 259 housing units.[1] Crescent Township was originally named Logan Township when it formed from Belmont Township on September 17, 1868. The named was then changed to Grenard Township in September 1869, and finally to Crescent Township on an unknown date.
According to the 2021 census gazetteer files, Crescent Township has a total area of 36.42sqmi, all land.[2]
The township contains Saint Peter's Lutheran Cemetery.
As of the 2020 census there were 567 people, 235 households, and 187 families residing in the township. The population density was 15.57PD/sqmi. There were 259 housing units at an average density of 7.11/sqmi. The racial makeup of the township was 94.36% White, 0.18% African American, 0.18% Native American, 0.53% Asian, 0.00% Pacific Islander, 0.18% from other races, and 4.59% from two or more races. Hispanic or Latino of any race were 3.53% of the population.
There were 235 households, out of which 32.80% had children under the age of 18 living with them, 66.81% were married couples living together, 10.21% had a female householder with no spouse present, and 20.43% were non-families. 14.90% of all households were made up of individuals, and 8.10% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.51.
The township's age distribution consisted of 13.7% under the age of 18, 11.9% from 18 to 24, 23.1% from 25 to 44, 27.8% from 45 to 64, and 23.5% who were 65 years of age or older. The median age was 47.0 years. For every 100 females, there were 83.7 males. For every 100 females age 18 and over, there were 84.2 males.
The median income for a household in the township was $67,708, and the median income for a family was $71,042. Males had a median income of $60,179 versus $28,173 for females. The per capita income for the township was $45,626. About 3.7% of families and 5.2% of the population were below the poverty line, including 6.8% of those under age 18 and none of those age 65 or over.