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Email BoardOld Mill Elementary
352 Throckmorton Avenue, Mill Valley, CA 94941-2640
Summary
Old Mill Elementary is a good school.
Reading and math results average to the 92nd percentile among comparable California schools.
75.0% of students met California's reading standard, but it is quickly trending down.
78.0% of students met California's math standard, which is strong statewide but is trending down.
Proficiency stats
| Current Reading Proficiency | 75.0% |
| Current Math Proficiency | 78.0% |
| Reading State Rank | 458/4,657 (90th percentile) |
| Math State Rank | 298/4,657 (94th percentile) |
School information
| Student / Teacher Ratio | 17:1 |
| Student enrollment (2024–25) | 261 |
| Low-Income Students | 10 (3.8%) |
| English Learners | 6 (2.3%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading fell 13.9 points from last year and fell 11.2 points over the full period. Math fell 4.2 points from last year and fell 5.7 points over the full period.
•Math -5.7 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Most students in every reported group meet the reading standard. Two or more races and White students have the strongest results.
Distribution of Scores by Grade
The share meeting the reading standard ranges from 57.9% to 86.8% across the grades shown. Overall, the school’s reading results rank in the top 10% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 12.5-point reading income gap is narrower than the 19.8-point gap at a typical California K–5 school.
English Learners vs English Native
Results for both language groups are unavailable, so a current reading gap cannot be calculated.
Math Proficiency Scores
2026 state test results
Race and Ethnicity
White students have the strongest math results at about 81% proficiency. The other reported groups range from about 70% to 70%.
Distribution of Scores by Grade
The share meeting the math standard ranges from 64.1% to 87.8% across the grades shown. Overall, the school’s math results rank in the top 7% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 31.1-point math income gap is wider than the 20.0-point gap at a typical California K–5 school.
English Learners vs English Native
Results for both language groups are unavailable, so a current math gap cannot be calculated.
Progress as students move up
2023–2026
How we compare income gaps
“Typical” means the median gap across 1,832 schools for reading and 1,839 for math. The comparison uses 2026 California K–5 schools with at least 20 tested students in each income group and a reported low-income student population. Each school counts once. Its gap is non-low-income proficiency minus low-income proficiency, including negative gaps. California state test data
Understanding this school
How does Old Mill Elementary compare within the district?
Old Mill Elementary is No. 5 in both reading and math proficiency among the 5 K–5 schools in Mill Valley Elementary with 2026 results.
Explore the district’s schoolsHow does Old Mill Elementary rank in California?
Old Mill Elementary ranks No. 458 of 4,657 in reading and No. 298 of 4,657 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How does Old Mill Elementary compare with other schools in Mill Valley?
Old Mill Elementary is No. 5 in both reading and math proficiency among the 5 K–5 schools in Mill Valley with 2026 results.
Explore schools in Mill ValleyHow does Old Mill Elementary compare with other schools in Marin County?
Old Mill Elementary is No. 12 in reading and No. 8 in math proficiency among the 27 K–5 schools in Marin County with 2026 results.
Explore schools in Marin CountyWhich schools should I compare?
Schools serving K–5 in the same district.
| School | Math | Reading |
|---|---|---|
| Old Mill ElementaryThis school | 78.0% | 75.0% |
| Edna Maguire Elementary | 83.5% | 79.8% |
| Park Elementary | 85.6% | 83.3% |
