Unified School District · IL
Illinois Valley Central Unit School District 321
Illinois Valley Central Unit School District 321 is a unified school district in Illinois with a community population of 12,082. The median household income is $82,255 and the median age is 45.0.
12,082
Population
212
People / sq mi
$82,255
Median Income
45.0
Median Age
Illinois Valley Central Unit School District 321 covers 57 sq mi of land at 211.7 people per square mile.
Race & Ethnicity
| White | 94.8% |
| Black or African American | 0.0% |
| Asian | 62.6% |
| Hispanic or Latino (any race) | 0.0% |
Economy & Income
$82,255
Median Household Income
$46,998
Per Capita Income
1.2%
Poverty Rate
1.1%
Unemployment
Housing
$164,700
Median Home Value
$942
Median Rent
87.6%
Homeownership
Education Attainment
96.1%
High School+
33.0%
Bachelor's+
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State rankings
Frequently Asked Questions
Illinois Valley Central Unit School District 321 serves a community with a population of 12,082 according to the latest Census ACS 5-Year estimates. This unified school district is located in Illinois.
The median household income in Illinois Valley Central Unit School District 321 is $82,255, with a per capita income of $46,998. The poverty rate is 1.2%.
Illinois Valley Central Unit School District 321 is 94.8% White, 0.0% Black or African American, 62.6% Asian, and 0.0% Hispanic or Latino, per Census ACS data.
In Illinois Valley Central Unit School District 321, 96.1% of adults have a high school diploma or higher, and 33.0% hold a bachelor's degree or higher, per Census ACS estimates.
The median home value in Illinois Valley Central Unit School District 321 is $164,700, with a median rent of $942. The homeownership rate is 87.6%.
More from Illinois
Data for Illinois Valley Central Unit School District 321 from the American Community Survey 5-Year estimates. Land area from Census Gazetteer files. This is a unified school district (GEOID: 1719970).
this entity is one of the data points covered by this site’s U.S. population demographics dataset. The detail above comes directly from the U.S. Census Bureau ACS and decennial files; the context that follows situates the headline numbers against the broader distribution across U.S. states, metros, cities, and ZIPs.
The methodology behind every numeric value on this page is publicly documented on the the U.S. Census Bureau ACS and decennial files portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. states, metros, cities, and ZIPs with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: U.S. Census Bureau ACS, 2026.