River Delta Joint Unified, CA

Original Research by School Decision on River Delta Joint Unified

River Delta Joint Unified is a kindergarten-through-twelfth-grade district serving a small enrollment across multiple communities in Solano County, including Rio Vista, Isleton, Walnut Grove, Clarksburg, and Suisun City. The district operates elementary, middle, and high schools alongside alternative, continuation, and community day programs.

Academic performance across the district is below the midpoint for proficiency when compared to other districts in Solano County. In English language arts, proficiency is lower in the elementary grades and improves modestly at sixth grade before declining again in the upper grades. Mathematics performance is notably weaker, with proficiency dropping sharply in fourth grade and remaining low through eighth grade. Science proficiency, measured in fifth and eighth grades, is also quite low. The district's overall proficiency index places it below the county median, and a parent should recognize that the majority of students are not meeting grade-level standards on state assessments.

The student body is predominantly Hispanic, making up a substantial majority of enrollment. The district also serves smaller populations of white, Asian, Black, Native Hawaiian or Pacific Islander, and multiracial students, as well as a small American Indian or Alaska Native population. The district does not publicly report its free-or-reduced-price lunch or English learner percentages, so a parent looking for detail on economic need or language support would benefit from contacting the district directly.

Chronic absenteeism in the district is near the county median, a meaningful baseline for understanding engagement and attendance patterns. The district did not report a graduation rate, so families seeking that data would need to reach out to the district office.

Housing in the communities served is moderately valued relative to state averages, though values vary by zip code. The most affordable areas are Isleton and Rio Vista, while Clarksburg commands higher prices. Monthly mortgage costs and rental availability range across the footprint, and housing affordability relative to median household income sits above national benchmarks, meaning the cost of housing is significant relative to local earnings.

A substantial and lasting factor shaping the district is the November 2020 school bond outcome. Measure J, a general obligation bond for School Facilities Improvement District 1, passed and funded modernization and repairs, including roof replacement, asbestos and mold removal, science lab upgrades, and technology updates. That same year, a parallel Measure K bond for School Facilities Improvement District 2 failed. This created an uneven landscape: schools in SFID 1 are receiving substantial long-term facility improvements funded by an ongoing property-tax levy on homeowners in that zone, while schools in SFID 2 did not gain those investments or assessments. For families deciding where to purchase a home or enroll a student, this geographic split in facility condition and investment is a concrete consideration.

The district has not undergone a major curriculum or governance change in recent years beyond the bond outcome. Parents seeking more detail on programs, staffing, student supports, or strategic priorities would benefit from visiting the district office or website directly, as comprehensive program and staffing data was not available in the public sources reviewed.

See more original research from School Decision →

District Context

Officially reported figures, 2024-25.

Enrollment

1,753

Grades

KG–12

Schools

Student body

Hispanic 59%

Black 3%

White 29%

Asian 2%

Two+ 6%

Am. Indian / AK Native 1%

Hawaiian / Pac. Isl. 1%

By economic status

Percent proficient by grade, as reported

Economically disadvantaged

Not disadvantaged

ELA

Gr ALL

31%

—

Gr 3

32%

50%

Gr 4

32%

33%

Gr 5

29%

43%

Gr 6

42%

61%

Gr 7

27%

45%

Gr 8

24%

47%

Gr 11

31%

—

Math

Gr ALL

20%

—

Gr 3

34%

42%

Gr 4

20%

33%

Gr 5

25%

29%

Gr 6

31%

44%

Gr 7

15%

26%

Gr 8

11%

30%

Gr 11

10%

—

Science

Gr ALL

14%

—

Gr 5

24%

21%

Gr 8

15%

33%

Gr 11

16%

—

Gr 12

—

Gr HS

17%

—

Gr UG_SEC

15%

—

Schools in this District

11 schools are officially reported under this district.

Mokelumne High (Continuation)

Walnut Grove Elementary

D. H. White Elementary

River Delta High/Elementary (Alternative)

River Delta Community Day

Clarksburg Middle

Academic Performance

Percent of students meeting or exceeding state standards, by grade.

Mathematics

6 grades reported

36%

Grade 3

23%

Grade 4

25%

Grade 5

33%

Grade 6

18%

Grade 7

15%

Grade 8

English Language Arts

6 grades reported

36%

Grade 3

32%

Grade 4

31%

Grade 5

45%

Grade 6

31%

Grade 7

28%

Grade 8

Science

2 grades reported

23%

Grade 5

19%

Grade 8

Social Studies

1 grade reported

57%

Grade 8

Housing & Real Estate

Data as of April 2026 | District-weighted from constituent ZIP codes

Home Values

Typical home value$555,830

Year-over-year change+0.5%

Range across 10 ZIP codes$409K to $806K

vs. state typical0.72x

vs. national typical1.51x

Home value trend (12 months)

ZIP code home values (10 ZIP codes)

ZIP	City	Value	YoY	Weight
94571	Rio Vista	$461K	-2.8%	29.6%
95612	Clarksburg	$806K	+3.8%	18.7%
95690	Walnut Grove	$543K	+3.0%	15.3%
95641	Isleton	$409K	+3.8%	12.0%
94585	Suisun City	$533K	-3.4%	9.6%
95615	Courtland	$590K	+0.4%	6.2%
95757	Elk Grove	$701K	-3.9%	0.9%
95620	Dixon	$610K	-1.7%	0.5%
95832	Sacramento	$422K	-1.6%	0.4%
95691	West Sacramento	$564K	-3.0%	0.0%

Rental Market

Typical monthly rent$2,597/mo

Year-over-year change+1.9%

Range across 4 ZIP codes$2,228 to $2,905/mo

Rent trend (12 months)

ZIP code rents (4 ZIP codes)

ZIP	City	Rent/mo	YoY	Weight
94585	Suisun City	$2,587	+1.6%	9.6%
95757	Elk Grove	$2,905	+5.3%	0.9%
95832	Sacramento	$2,228	—	0.4%
95691	West Sacramento	$2,321	+1.7%	0.0%

Affordability

Est. monthly mortgage (20% down at 6.48%)$2,805/mo

Home price / national median income6.6x

Annual rent / national median income37.2%

Est. mortgage exceeds rent by$208/mo

Comparison

State typical home value$776,233 (-1.1% YoY)

National typical home value$368,198 (+0.6% YoY)

State ZHVI trend (12 months)

National ZHVI trend (12 months)

Economic Context

30-year fixed mortgage rate6.48%

National unemployment rate4.3%

National median household income$83,730

CPI: Rent of shelter (index)447.05

30-year fixed mortgage rate (12 months)

National unemployment rate (12 months)

National median household income (12 months)

CPI: Rent of shelter (index) (12 months)

Sources: Zillow Home Value Index and Zillow Observed Rent Index (Zillow Group), Realtor.com via Federal Reserve Bank of St. Louis (FRED)

Data Currently Unavailable

Civil Rights Data (CRDC)

This profile is derived exclusively from publicly available federal and state datasets. It may not reflect the most current information available. We encourage parents and families to supplement this data with information published directly on the school’s website, which may include more recent figures, additional programs, or updated enrollment data.