Elementary School District · CA
Mark Twain Union Elementary School District
Mark Twain Union Elementary School District is a elementary school district in California with a community population of 9,846. The median household income is $82,219 and the median age is 51.9.
9,846
Population
43
People / sq mi
$82,219
Median Income
51.9
Median Age
Mark Twain Union Elementary School District covers 229 sq mi of land at 42.9 people per square mile.
Race & Ethnicity
| White | 81.6% |
| Black or African American | 0.0% |
| Asian | 56.8% |
| Hispanic or Latino (any race) | 0.0% |
Economy & Income
$82,219
Median Household Income
$43,011
Per Capita Income
7.8%
Poverty Rate
2.1%
Unemployment
Housing
$499,700
Median Home Value
$1,948
Median Rent
83.9%
Homeownership
Education Attainment
93.0%
High School+
24.6%
Bachelor's+
Other California School Districts
Largest Cities in California
Largest Counties in California
Congressional Districts in California
State rankings
Frequently Asked Questions
Mark Twain Union Elementary School District serves a community with a population of 9,846 according to the latest Census ACS 5-Year estimates. This elementary school district is located in California.
The median household income in Mark Twain Union Elementary School District is $82,219, with a per capita income of $43,011. The poverty rate is 7.8%.
Mark Twain Union Elementary School District is 81.6% White, 0.0% Black or African American, 56.8% Asian, and 0.0% Hispanic or Latino, per Census ACS data.
In Mark Twain Union Elementary School District, 93.0% of adults have a high school diploma or higher, and 24.6% hold a bachelor's degree or higher, per Census ACS estimates.
The median home value in Mark Twain Union Elementary School District is $499,700, with a median rent of $1,948. The homeownership rate is 83.9%.
More from California
Data for Mark Twain Union Elementary School District from the American Community Survey 5-Year estimates. Land area from Census Gazetteer files. This is a elementary school district (GEOID: 0623970).
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.