| Official Name: | Vandalia Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Fayette County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Fayette County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Fayette |
| Established Title: | Established |
| Established Date: | November 9, 1859 |
| Area Total Sq Mi: | 35.37 |
| Area Land Sq Mi: | 35.08 |
| Area Water Sq Mi: | 0.29 |
| Area Water Percent: | 0.82 |
| Population As Of: | 2020 |
| Population Total: | 6364 |
| Population Density Sq Mi: | auto |
| Elevation M: | 140 |
| Elevation Ft: | 459 |
| Coordinates: | 38.9556°N -89.0878°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 62418, 62471, 62885 |
| Blank Name: | FIPS code |
| Blank Info: | 17-051-77330 |
| Unit Pref: | Imperial |
Vandalia Township is one of twenty townships in Fayette County, Illinois, USA. As of the 2020 census, its population was 6,364 and it contained 3,069 housing units.[1]
According to the 2021 census gazetteer files, Vandalia Township has a total area of 35.37sqmi, of which 35.08sqmi (or 99.18%) is land and 0.29sqmi (or 0.82%) is water.[2]
The township contains these eight cemeteries: Fairlawn, Haley Chapel, Mother of Dolors, Old State Burial Ground, Pinhook, Ritter, South Hill and Vandalia City.
As of the 2020 census there were 6,364 people, 2,714 households, and 1,559 families residing in the township. The population density was 179.92PD/sqmi. There were 3,069 housing units at an average density of 86.76/sqmi. The racial makeup of the township was 93.54% White, 1.07% African American, 0.24% Native American, 0.66% Asian, 0.00% Pacific Islander, 0.69% from other races, and 3.80% from two or more races. Hispanic or Latino of any race were 2.17% of the population.
There were 2,714 households, out of which 27.30% had children under the age of 18 living with them, 43.66% were married couples living together, 9.29% had a female householder with no spouse present, and 42.56% were non-families. 37.60% of all households were made up of individuals, and 18.50% had someone living alone who was 65 years of age or older. The average household size was 2.29 and the average family size was 2.99.
The township's age distribution consisted of 20.1% under the age of 18, 8.5% from 18 to 24, 24.7% from 25 to 44, 26.1% from 45 to 64, and 20.7% who were 65 years of age or older. The median age was 40.8 years. For every 100 females, there were 97.4 males. For every 100 females age 18 and over, there were 91.9 males.
The median income for a household in the township was $36,990, and the median income for a family was $51,547. Males had a median income of $28,929 versus $24,934 for females. The per capita income for the township was $21,968. About 16.7% of families and 20.9% of the population were below the poverty line, including 19.8% of those under age 18 and 13.9% of those age 65 or over.