River Montessori Elementary Charter
Elementary school in Petaluma, CA · Old Adobe Union · Grades K-6 · Charter
On the spring 2026 state tests, 68% of River Montessori Elementary Charter students met or exceeded California's reading (ELA) standard and 55% met the math standard. In reading, that is 19 points above the California average (49%). Its reading result is higher than 72% of Bay Area elementary schools, and it ranks 4th of 20 public elementary schools in Petaluma. Reading results in 2026 were 2 points lower than in 2024, and math results were 12 points higher than in 2024.
Test scores, 2024 to 2026
| Subject | Spring 2024 | Spring 2025 | Spring 2026 | Change |
|---|---|---|---|---|
| Reading (ELA) | 70% | 61% | 68% | −2 pts |
| Math | 44% | 57% | 55% | +12 pts |
Compared with nearby averages
| Spring 2026 | Reading (ELA) | Math |
|---|---|---|
| River Montessori Elementary Charter | 68% | 55% |
| Sonoma County | 45% | 33% |
| California | 49% | 38% |
Results by grade, spring 2026
| Grade | Reading (ELA) | Math |
|---|---|---|
| 3rd grade | 81% | 69% |
| 4th grade | 33% | 40% |
| 5th grade | 87% | 60% |
Students are tested in grades 3 to 8 and 11. Each grade is a different group of students, so differences between grades are not a trend.
Homes near River Montessori Elementary Charter
The typical home value in ZIP code 94954, where River Montessori Elementary Charter is located, is $829K, up 0.6% over the past year (Zillow Home Value Index). Prices inside the school's attendance zone can differ.
Charter schools usually admit by application or lottery, so where you live may not decide whether your child can attend.
Nearby elementary schools
| Distance | School | Reading (ELA) | Math | Typical home value (ZIP) |
|---|---|---|---|---|
| 1.5 mi | Miwok Valley Elementary Charter CharterPetaluma · Grades P-6 | 32% | 30% | $829K |
| 1.9 mi | La Tercera ElementaryPetaluma · Grades K-6 | 58% | 44% | $829K |
| 2.3 mi | McDowell ElementaryPetaluma · Grades K-6 | 9% | 13% | $829K |
| 2.4 mi | Grant ElementaryPetaluma · Grades K-6 | 72% | 70% | $1.06M |
| 2.6 mi | Old Adobe Elementary Charter CharterPetaluma · Grades K-6 | 51% | 44% | $829K |
| 2.7 mi | McNear ElementaryPetaluma · Grades K-6 | 58% | 57% | $1.06M |
School details
- Address
- 3880 Cypress Drive Suite B, Petaluma, CA 94954
Get directions · See it on our map - Phone
- (707) 778-6414
- District
- Old Adobe Union
- County
- Sonoma County
- Grades
- K-6
- Students
- 141 (2025-26)
- Type
- Elementary school · Traditional · Charter
- Opened
- 2009
- State school code
- 49708470119750
Common questions
How did River Montessori Elementary Charter do on state tests?
In spring 2026, 68% of students met or exceeded the reading (ELA) standard and 55% met the math standard, compared with 49% and 38% across California.
How many students attend River Montessori Elementary Charter?
141 students were enrolled in the 2025-26 school year, in grades K-6.
How much do homes cost near River Montessori Elementary Charter?
The typical home value in ZIP code 94954, where River Montessori Elementary Charter is located, is $829K, up 0.6% over the past year (Zillow Home Value Index). Prices inside the school's attendance zone can differ.
Does living near River Montessori Elementary Charter guarantee a spot?
No. As a charter school it usually admits by application or lottery rather than by address.