Photo above: The historic front entrance of Rio Vista High School, Rio Vista, California, 2026. UnifiedFunctionality, CC BY-SA 4.0, via Wikimedia Commons.
River Delta Unified School District serves Rio Vista. Inside the city it runs D. H. White Elementary, Riverview Middle School and Rio Vista High School, and the district office is at 445 Montezuma Street, (707) 374-1700 (River Delta Unified School District, rdusd.org, checked September 25, 2026).
Assignment depends on the exact address. The district doesn’t post a boundary map on its website, so call the district office to confirm the schools for a specific home before you write an offer. Don’t rely on the school line in a listing.
Which schools are in Rio Vista?
Three neighborhood schools, plus a small alternative program. Addresses are from the California School Dashboard’s school records, and enrollment is the 2025-26 Census Day count (CDE DataQuest, checked September 25, 2026):
| School | Address | 2025-26 enrollment |
|---|---|---|
| D. H. White Elementary | 500 Elm Way | 417 |
| Riverview Middle School | 525 South Second Street | 146 |
| Rio Vista High School | 410 South Fourth Street | 319 |
The district as a whole enrolled 1,993 students on Census Day 2025-26 (CDE DataQuest). It also covers communities outside Rio Vista, including Isleton, and its list of schools includes Wind River Adult Education.
Grade spans need a phone call. The city’s School Directory lists D. H. White as kindergarten through 5th grade and Riverview as 6th through 8th (City of Rio Vista, School Directory page, checked September 25, 2026). The Dashboard and the district’s own enrollment page point to Riverview serving grades 7 and 8. Ask the district which grades each school serves this year.
How do I confirm the school for a specific address?
Call the district. Its enrollment page says new students enroll at their home school first, and that intra-district transfers are considered only after that (River Delta Unified, Student Enrollment page, checked September 25, 2026). So the address sets your starting point.
Before you make an offer:
- Call River Delta Unified at (707) 374-1700 with the exact address.
- Ask which schools serve it this year and whether any grade is full.
- Ask how transfer requests work if you want a different school.
- Get the answer in writing, or note who told you and when.
Boundaries and grade setups can change, and listing sites often guess.
What do the state’s 2025 numbers show?
Here’s the 2025 California School Dashboard, all students, for the district and the state (California School Dashboard, 2025, read September 25, 2026). “Distance from standard” is how far the average student scored above or below the state’s standard on the tests. Negative means below.
| 2025 Dashboard measure | River Delta Unified | California |
|---|---|---|
| English language arts, distance from standard | 39.2 points below (up 17.9) | 8.1 points below |
| Math, distance from standard | 82.9 points below (up 5.2) | 42.4 points below |
| Graduation rate | 91.9% | 87.8% |
| College and career prepared | 46.8% | 51.7% |
| Chronic absenteeism | 24.6% | 17.1% |
| Suspension rate | 6.0% | 2.9% |
And for the three schools in town (same source):
| 2025 Dashboard measure | D. H. White | Riverview Middle | Rio Vista High |
|---|---|---|---|
| English language arts | 63.3 below (up 11.6) | 15.6 below (up 20.0) | 32.4 below (up 104.4) |
| Math | 71.1 below (up 4.9) | 73.1 below (up 2.2) | 131.4 below (up 18.0) |
| Chronic absenteeism | 29.1% | 33.3% | Not applicable (a K to 8 measure) |
| Suspension rate | 3.6% | 20.1% | 7.6% |
| Graduation rate | Not applicable | Not applicable | 92.5% |
Why did Rio Vista High’s English score jump 104 points?
Mostly because 2024 was an unusually low year. The Dashboard shows Rio Vista High at 136.8 points below standard in 2024, down from 46.2 below in 2023, then 32.4 below in 2025, with 66 students tested (California School Dashboard, read September 25, 2026). Small schools can swing a lot from one group of test takers to the next. Look at several years, not one change number.
How should I use these numbers?
As a starting point, not a verdict. A few tips:
- Compare trends. The Dashboard shows change from last year. Several years in a row tell you more.
- Read the school’s own report. Every public school publishes a School Accountability Report Card (SARC). Ask the school for it.
- Visit. Call the school office and ask about tours or open house dates.
- Ask about programs you care about, like special education, advanced classes or career pathways.
We don’t rank or rate schools. The Dashboard and the district are the sources.
Questions people also ask
What school district is Rio Vista in?
Rio Vista is served by River Delta Unified School District, with its office at 445 Montezuma Street in Rio Vista, phone (707) 374-1700, per rdusd.org checked September 25, 2026. The district runs D. H. White Elementary, Riverview Middle and Rio Vista High inside the city. Always verify which school serves a specific address with the district before you buy.
How do I find my school boundaries in Rio Vista?
Call River Delta Unified at (707) 374-1700 with the exact address. The district doesn’t post a boundary map on its website, checked September 25, 2026, and its enrollment page says students enroll at their home school first before any transfer is considered. Listing sites often guess, so confirm the answer with the district before you write an offer.
What is the graduation rate at Rio Vista High School?
The 2025 California School Dashboard shows a 92.5% graduation rate at Rio Vista High School, compared with 91.9% for River Delta Unified and 87.8% statewide, read September 25, 2026. Its English and math results were below the state standard. Check the Dashboard for several years of results and confirm school assignment with the district.
How many students attend Rio Vista schools?
On Census Day 2025-26, D. H. White Elementary had 417 students, Rio Vista High 319 and Riverview Middle 146, per CDE DataQuest checked September 25, 2026. River Delta Unified as a whole enrolled 1,993 students, including schools outside Rio Vista. Call the district to verify grade levels and which school serves your address.
Your next step
Looking at homes in Rio Vista? Send us the addresses. We’ll call the district with you to confirm the schools for each one, and pull recent sales and the flood zone so you can compare the homes side by side. Talk with our team about Rio Vista or call (510) 949-5525.
More on Rio Vista: Is Rio Vista a good place to live? · How much does a house cost in Rio Vista? · Search Rio Vista homes · What’s my home worth?
By Bill Davis, DRE #01880656, The Davis Team at eXp Realty, Rio Vista, CA. Updated September 25, 2026.
Sources
- River Delta Unified School District, home page and Student Enrollment page: rdusd.org (checked September 25, 2026)
- California School Dashboard, 2025 Dashboard, River Delta Joint Unified (CDS 34674130000000), D. H. White Elementary, Riverview Middle and Rio Vista High, and state results, read through the Dashboard’s public data service: caschooldashboard.org (read September 25, 2026)
- California Department of Education, DataQuest, 2025-26 Census Day enrollment by grade, River Delta Joint Unified: dq.cde.ca.gov (checked September 25, 2026)
- City of Rio Vista, School Directory page: riovistacity.com/community/page/school-directory (checked September 25, 2026)