For the 2026 school year, there are 4 public charter schools serving 1,439 students in Old Adobe Union School District. This district's average charter testing ranking is 7/10, which is in the top 50% of public charter schools in California.
Public Charter Schools in Old Adobe Union School District have an average math proficiency score of 42% (versus the California public charter school average of 32%), and reading proficiency score of 46% (versus the 48% statewide average).
Minority enrollment is 55% of the student body (majority Hispanic), which is less than the California public charter school average of 75% (majority Hispanic).
Overview
This School District
This State (CA)
# Schools
5 Schools
1,290 Schools
# Students
1,734 Students
726,781 Students
# Teachers
73 Teachers
32,221 Teachers
Student-Teacher Ratio
24:1
24:1
Student By Grade
District Rank
Old Adobe Union School District, which is ranked #714 of all 1,904 school districts in California (based off of combined math and reading proficiency testing data) for the 2022-2023 school year.
Overall District Rank
#686 out of 1932 school districts
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
39%
34%
Reading/Language Arts Test Scores (% Proficient)
44%
47%
Science Test Scores (% Proficient)
25%
29%
Students by Ethnicity:
Diversity Score
0.60
0.65
% American Indian
n/a
1%
% Asian
3%
7%
% Hispanic
43%
53%
% Black
1%
7%
% White
47%
25%
% Hawaiian
n/a
n/a
% Two or more races
6%
7%
All Ethnic Groups
District Revenue and Spending
The revenue/student of $18,039 in this school district is less than the state median of $20,100. The school district revenue/student has grown by 15% over four school years.
The school district's spending/student of $21,103 is higher than the state median of $18,511. The school district spending/student has grown by 38% over four school years.
Total Revenue
$31 MM
$116,387 MM
Spending
$37 MM
$107,188 MM
Revenue / Student
$18,039
$20,100
Spending / Student
$21,103
$18,511
Best Old Adobe Union School District Public Charter Schools (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Sonoma Mountain Elementary School
Charter School
(Math: 61% | Reading: 66%)
Rank:
Rank:
9/
Top 20%10
1900 Rainier Cir.
Petaluma, CA 94954
(707) 765-4305
Petaluma, CA 94954
(707) 765-4305
Gr: K-6 | 422 students Student-teacher ratio: 25:1 Minority enrollment: 30%
Rank: #22.
Old Adobe Elementary Charter
Charter School
(Math: 45-49% | Reading: 50-54%)
Rank:
Rank:
8/
Top 30%10
2856 Adobe Rd.
Petaluma, CA 94954
(707) 765-4301
Petaluma, CA 94954
(707) 765-4301
Gr: K-6 | 278 students Student-teacher ratio: 25:1 Minority enrollment: 31%
Rank: #33.
Loma Vista Immersion Academy
Charter School
(Math: 39% | Reading: 30-34%)
Rank:
Rank:
5/
Bottom 50%10
207 Maria Dr.
Petaluma, CA 94954
(707) 765-4302
Petaluma, CA 94954
(707) 765-4302
Gr: K-6 | 451 students Student-teacher ratio: 25:1 Minority enrollment: 78%
Rank: #44.
Miwok Valley Elementary Charter
Charter School
(Math: 10-14% | Reading: 20-24%)
Rank:
Rank:
2/
Bottom 50%10
1010 Saint Francis Dr.
Petaluma, CA 94954
(707) 765-4304
Petaluma, CA 94954
(707) 765-4304
Gr: K-6 | 288 students Student-teacher ratio: 21:1 Minority enrollment: 79%
Recent Articles
When “Free Public School” Still Isn’t Free
Discover the hidden costs of public school in 2026, from supplies and fees to transportation, technology, and extracurricular expenses.
What a District Budget Cut Means for Your Child's School Experience
Learn how district budget cuts can affect class sizes, programs, staffing, transportation, and your child's daily school experience in 2026.
School Closure Risk: What Parents Should Check Before Moving
Learn how parents can assess school closure risk before buying or renting in a district, using enrollment, funding, and boundary data.
