| Seymour | |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Champaign |
| Subdivision Type3: | Township |
| Subdivision Name3: | Scott |
| Area Total Km2: | 0.67 |
| Area Total Sq Mi: | 0.09 |
| Area Land Sq Mi: | 0.09 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 317 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Timezone: | Central |
| Elevation Footnotes: | [1] |
| Elevation M: | 217 |
| Elevation Ft: | 712 |
| Postal Code Type: | ZIP code |
| Postal Code: | 61875 |
| Area Code: | 217 |
| Blank Name: | FIPS code |
| Blank Info: | 17-68809 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2628560 |
| Unit Pref: | Imperial |
Seymour is a census-designated place in Champaign County, Illinois, United States. At the 2020 census it had a population of 317. It is part of Mahomet-Seymour Community Unit School District No. 3.
Seymour is located at 40.1068°N -88.4271°W (40.1069769, -88.4267245).[2] It is located in Scott Township, Champaign County, Illinois. According to the 2021 census gazetteer files, Seymour has a total area of 0.09sqmi, all land.[3]
As of the 2020 census[4] there were 317 people, 41 households, and 30 families residing in the CDP. The population density was 3408.6PD/sqmi. There were 122 housing units at an average density of 1311.83/mi2. The racial makeup of the CDP was 93.38% White, 1.26% African American, 1.26% from other races, and 4.10% from two or more races. Hispanic or Latino of any race were 0.95% of the population.
There were 41 households, out of which 43.9% had children under the age of 18 living with them, 73.17% were married couples living together, none had a female householder with no husband present, and 26.83% were non-families. 26.83% of all households were made up of individuals, and none had someone living alone who was 65 years of age or older. The average household size was 4.07 and the average family size was 3.54.
The CDP's age distribution consisted of 18.6% under the age of 18, 17.9% from 18 to 24, 20% from 25 to 44, 35.8% from 45 to 64, and 7.6% who were 65 years of age or older. The median age was 40.3 years. For every 100 females, there were 61.1 males. For every 100 females age 18 and over, there were 59.5 males.
The median income for a household in the CDP was $105,893, and the median income for a family was $133,000. Males had a median income of $36,429 versus $42,143 for females. The per capita income for the CDP was $37,757. No families and 8.3% of the population were below the poverty line, including none of those under age 18 and 0.0% of those age 65 or over.