For the 2025-26 school year, there are 4 public charter schools serving 1,513 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
1,298 Schools
# Students
1,826 Students
710,338 Students
# Teachers
81 Teachers
31,359 Teachers
Student-Teacher Ratio
23:1
23:1
Student By Grade
District Rank
Old Adobe Union School District, which is ranked #720 of all 1,908 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
0.59
0.65
% American Indian
1%
1%
% Asian
3%
7%
% Hispanic
44%
53%
% Black
1%
7%
% White
46%
25%
% Hawaiian
n/a
n/a
% Two or more races
5%
7%
All Ethnic Groups
District Revenue and Spending
The revenue/student of $17,130 in this school district is less than the state median of $19,978. The school district revenue/student has stayed relatively flat over four school years.
The school district's spending/student of $20,039 is higher than the state median of $18,399. The school district spending/student has stayed relatively flat over four school years.
Total Revenue
$31 MM
$116,387 MM
Spending
$37 MM
$107,188 MM
Revenue / Student
$17,130
$19,978
Spending / Student
$20,039
$18,399
Best Old Adobe Union School District Public Charter Schools (2025-26)
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 | 451 students Student-teacher ratio: 27:1 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 | 295 students Student-teacher ratio: 23:1 Minority enrollment: 33%
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 | 468 students Student-teacher ratio: 22:1 Minority enrollment: 77%
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 | 299 students Student-teacher ratio: 18:1 Minority enrollment: 79%
Recent Articles

2025 Classroom Size Trends: Are Classes Still Growing?
A 2025 update on U.S. classroom sizes, policy battles, student outcomes, and whether class sizes continue to expand.

Personalized Learning in 2025: Revolutionizing Education
Explore how personalized learning is reshaping education in 2025—insights, policy, impact, and real-world models for students, parents, and educators.

How Bullying Impacts Student Academic Performance in 2025
Explore how bullying harms student achievement, attendance, and well-being — and strategies schools use in 2025 to mitigate its effects.