| Official Name: | Santa Anna Township |
| Settlement Type: | Township |
| Unit Pref: | imperial |
| Image Map1: | Map of Illinois highlighting DeWitt County.svg |
| Mapsize1: | 150px |
| Map Caption1: | DeWitt County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | DeWitt |
| Established Title: | Established |
| Established Date: | November 2, 1858 |
| Area Total Sq Mi: | 29.02 |
| Area Land Sq Mi: | 28.90 |
| Area Water Sq Mi: | 0.13 |
| Area Water Percent: | 0.44 |
| Population As Of: | 2020 |
| Population Total: | 2276 |
| Population Density Sq Mi: | auto |
| Elevation M: | 218 |
| Elevation Ft: | 715 |
| Coordinates: | 40.2397°N -88.6486°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP code |
| Postal Code: | 61842 |
| Blank Name Sec1: | FIPS code |
| Blank Info Sec1: | 17-039-67639 |
| Blank1 Name Sec1: | GNIS feature ID |
| Blank1 Info Sec1: | 429713 |
Santa Anna Township is one of thirteen townships in DeWitt County, Illinois, USA. As of the 2020 census, its population was 2,276 and it contained 1,085 housing units. Its name was changed from Mt. Pleasant Township on June 7, 1859.
According to the 2021 census gazetteer files, Santa Anna Township has a total area of 29.02sqmi, of which 28.9sqmi (or 99.56%) is land and 0.13sqmi (or 0.44%) is water.[1]
(This list is based on USGS data and may include former settlements.)
The township contains these five cemeteries: Campground, Farmer City, Greenleaf, Maple Grove and Saint Josephs Catholic.
As of the 2020 census[2] there were 2,276 people, 959 households, and 628 families residing in the township. The population density was 78.42PD/sqmi. There were 1,085 housing units at an average density of 37.38/sqmi. The racial makeup of the township was 94.02% White, 0.75% African American, 0.09% Native American, 0.09% Asian, 0.13% Pacific Islander, 0.31% from other races, and 4.61% from two or more races. Hispanic or Latino of any race were 1.93% of the population.
There were 959 households, out of which 25.20% had children under the age of 18 living with them, 59.02% were married couples living together, 5.32% had a female householder with no spouse present, and 34.52% were non-families. 32.60% of all households were made up of individuals, and 16.20% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.92.
The township's age distribution consisted of 21.8% under the age of 18, 4.2% from 18 to 24, 16.3% from 25 to 44, 35.8% from 45 to 64, and 22.0% who were 65 years of age or older. The median age was 49.3 years. For every 100 females, there were 80.1 males. For every 100 females age 18 and over, there were 82.0 males.
The median income for a household in the township was $63,920, and the median income for a family was $83,750. Males had a median income of $36,208 versus $30,500 for females. The per capita income for the township was $27,376. About 8.1% of families and 11.6% of the population were below the poverty line, including 17.8% of those under age 18 and 11.6% of those age 65 or over.