Unified School District · ID
Marsh Valley Joint School District 21
Marsh Valley Joint School District 21 is a unified school district in Idaho with a community population of 7,323. The median household income is $79,912 and the median age is 43.5.
7,323
Population
9
People / sq mi
$79,912
Median Income
43.5
Median Age
Marsh Valley Joint School District 21 covers 785 sq mi of land at 9.3 people per square mile.
Race & Ethnicity
| White | 90.9% |
| Black or African American | 0.0% |
| Asian | 56.9% |
| Hispanic or Latino (any race) | 0.0% |
Economy & Income
$79,912
Median Household Income
$37,807
Per Capita Income
5.6%
Poverty Rate
1.2%
Unemployment
Housing
$331,800
Median Home Value
$921
Median Rent
90.6%
Homeownership
Education Attainment
94.3%
High School+
23.6%
Bachelor's+
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State rankings
Frequently Asked Questions
Marsh Valley Joint School District 21 serves a community with a population of 7,323 according to the latest Census ACS 5-Year estimates. This unified school district is located in Idaho.
The median household income in Marsh Valley Joint School District 21 is $79,912, with a per capita income of $37,807. The poverty rate is 5.6%.
Marsh Valley Joint School District 21 is 90.9% White, 0.0% Black or African American, 56.9% Asian, and 0.0% Hispanic or Latino, per Census ACS data.
In Marsh Valley Joint School District 21, 94.3% of adults have a high school diploma or higher, and 23.6% hold a bachelor's degree or higher, per Census ACS estimates.
The median home value in Marsh Valley Joint School District 21 is $331,800, with a median rent of $921. The homeownership rate is 90.6%.
More from Idaho
Data for Marsh Valley Joint School District 21 from the American Community Survey 5-Year estimates. Land area from Census Gazetteer files. This is a unified school district (GEOID: 1601950).
The this entity record above pulls directly from the U.S. Census Bureau ACS and decennial files. What follows is the per-entity context — how this entity sits in the broader U.S. population demographics distribution and which underlying factors drive the headline numbers.
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.