Unified School District · ID
Madison School District 321
Madison School District 321 is a unified school district in Idaho with a community population of 49,923. The median household income is $56,189 and the median age is 21.2.
49,923
Population
147
People / sq mi
$56,189
Median Income
21.2
Median Age
Madison School District 321 covers 340 sq mi of land at 146.9 people per square mile.
Race & Ethnicity
| White | 87.2% |
| Black or African American | 0.0% |
| Asian | 57.0% |
| Hispanic or Latino (any race) | 0.1% |
Economy & Income
$56,189
Median Household Income
$23,297
Per Capita Income
13.7%
Poverty Rate
6.0%
Unemployment
Housing
$413,800
Median Home Value
$1,000
Median Rent
36.6%
Homeownership
Education Attainment
97.3%
High School+
41.6%
Bachelor's+
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State rankings
Frequently Asked Questions
Madison School District 321 serves a community with a population of 49,923 according to the latest Census ACS 5-Year estimates. This unified school district is located in Idaho.
The median household income in Madison School District 321 is $56,189, with a per capita income of $23,297. The poverty rate is 13.7%.
Madison School District 321 is 87.2% White, 0.0% Black or African American, 57.0% Asian, and 0.1% Hispanic or Latino, per Census ACS data.
In Madison School District 321, 97.3% of adults have a high school diploma or higher, and 41.6% hold a bachelor's degree or higher, per Census ACS estimates.
The median home value in Madison School District 321 is $413,800, with a median rent of $1,000. The homeownership rate is 36.6%.
More from Idaho
Data for Madison School District 321 from the American Community Survey 5-Year estimates. Land area from Census Gazetteer files. This is a unified school district (GEOID: 1601920).
For this entity, the underlying data on this page comes from the U.S. Census Bureau ACS and decennial files. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
Every number on this page links back to the U.S. Census Bureau ACS and decennial files; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. states, metros, cities, and ZIPs. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: U.S. Census Bureau ACS, 2026.