Enrollment
261
Elementary
DISTRICT 318 · STATE 465
SCHOOL COMMUNITY·MILL VALLEY ELEMENTARY·NCES 062487003713
Old Mill Elementary
352 Throckmorton Ave., Mill Valley, CA 94941 · (415) 389-7727 · Marin County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL261 STUDENTS
A
allk12 Grade
Scored higher than 88% of California public elementary schools
- A+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- B+Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- CThree-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded California public elementary schools
Student : Teacher
21.8:1
12 FTE teachers
DISTRICT 20.8:1 · STATE 22.3:1
Free / Reduced Lunch
4%
10 students
DISTRICT 5% · STATE 65%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Kindergarten | 45 | 17% |
| Grade 1 | 45 | 17% |
| Grade 2 | 44 | 17% |
| Grade 3 | 42 | 16% |
| Grade 4 | 45 | 17% |
| Grade 5 | 40 | 15% |
This year's kindergarten class (45) is 13% larger than its 5th grade class (40).
Student demographics
46%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 47% · STATE 62% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
School pathway
Students here typically continue to
Old Mill Elementary→Mill Valley Middle
Based on grade levels within Mill Valley Elementary. Attendance zones can vary; confirm enrollment with the district.
Test scores
CAASPP 2024-25 . % met or exceeded standardEnglish Language Arts
88.9%
CA avg 49.1% . +6.9pp since 2014
Math
82.3%
CA avg 37.7% . +0.3pp since 2014
What this means: On the CAASPP, California's statewide test, about 89 of every 100 students at this school read and write at grade level and about 82 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are up about 7 points since 2014, while math scores have held steady.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 54.0% | 34.9% | 6.3% | 4.8% |
| Math | 54.0% | 28.2% | 15.3% | 2.4% |
Share of tested students at each CAASPP level. Each student counts in one level, so a row adds to about 100%.
CAASPP results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 88.9% | 82.3% |
| 2023-24 | 86.2% | 83.7% |
| 2022-23 | 85.3% | 85.3% |
| 2021-22 | 89.5% | 85.0% |
| 2018-19 | 90.2% | 89.4% |
| 2017-18 | 92.6% | 89.5% |
| 2016-17 | 88.8% | 87.0% |
| 2015-16 | 89.0% | 92.0% |
| 2014-15 | 82.0% | 82.0% |
% met or exceeded standard, all students and all tested grades.
Source: CAASPP. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
85.4%
composite math + reading, all grades
Predicted
77.3%
based on CA schools with similar FRL share
Beats by
+8.1pp
above demographic expectation
What this means: About 85% of students here test proficient in math and reading, compared with the roughly 77% typical for California schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among California's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Old Mill Elementary
Old Mill Elementary's state test result (85.4% proficient) is higher than 4 of the 4 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Old Mill Elementary this school | 261 | 3.8% | 85.4% |
| Park Elementary Mill Valley | 301 | 2.7% | 84.6% |
| Hidden Valley Elementary San Anselmo | 274 | 8.4% | 80.8% |
| Wade Thomas Elementary San Anselmo | 292 | 7.2% | 82.2% |
| Creekside Charter Olympic Valley | 233 | 6.9% | N/A |
| Ormondale Elementary Portola Valley | 243 | 6.2% | 81.2% |
Matched among California elementary schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Old Mill Elementary ranks
Among elementary schools| Measure | This school | In California | In Marin County |
|---|---|---|---|
| State test proficiency ranked highest first | 85.4% | #79 of 5,151 | #3 of 34 |
| Math proficiency ranked highest first | 82.3% | #161 of 5,172 ▼ 46 | #7 of 35 ▼ 3 |
| Reading proficiency ranked highest first | 88.9% | #30 of 5,172 ▲ 38 | #2 of 35 no change |
| 3-year test score change ranked biggest drop first | -1.6pp | #1,330 of 5,116 | #9 of 35 |
| Enrollment ranked largest first | 261 | #5,056 of 5,915 | #32 of 44 |
| Students per teacher ranked fewest first | 21.8:1 | #1,996 of 5,352 | #21 of 35 |
| Diversity index ranked most diverse first | 45.8% | #3,081 of 5,354 | #23 of 35 |
| Free and reduced lunch ranked highest share first | 3.8% | #5,600 of 5,625 | #34 of 37 |
| Enrollment change since 2017-18 ranked steepest decline first | -12.4% | #2,379 of 3,837 | #16 of 26 |
Ranked against other public elementary schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
261
-17 (-6%) vs 2020
-11% since 1990-91, when it was 293
Student : Teacher
21.8:1
was 21.4:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 261 | 12 | 21.8:1 | 4% (10) |
| 2023-24 | 251 | 12 | 20.9:1 | 4% (10) |
| 2022-23 | 257 | 12 | 21.4:1 | 4% (9) |
| 2020-21 | 278 | 13 | 21.4:1 | 2% (6) |
| 2017-18 | 298 | 13 | 22.9:1 | 2% (7) |
| 2015-16 | 328 | 14 | 23.4:1 | 1% (3) |
| 2010-11 | 315 | N/A | N/A | 2% (6) |
| 2000-01 | 303 | 15 | 20.2:1 | 1% (2) |
| 1990-91 | 293 | 12 | 24.4:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Old Mill Elementary.
Since 2017-18: students down 12% (298 to 261); teachers down 8% (13 to 12).
About Old Mill Elementary
Old Mill Elementary is one of the public schools in Mill Valley, California. It is a small elementary school. The school reports 261 students in kindergarten through 5. The typical figure for elementary schools in California is about 465 students.
Old Mill Elementary is part of a district of 6 schools: Mill Valley Elementary, with 2,309 students.
At 70%, White students outnumber all other groups at Old Mill Elementary combined. The remaining students are 21% multiracial, 6% Hispanic, and 3% Asian. The county population is about 68% White, within a few points of the school. By the diversity index, Old Mill Elementary comes in at 46%.
Staffing totals 12 full-time-equivalent teachers, and the student-to-teacher ratio is 21.8:1. Elementary schools in California average about 22.3:1, a similar figure. A measure often used for student poverty, free or reduced-price lunch eligibility, stands at 4%. That is lower than the 35% average for public schools in Marin County.
Old Mill Elementary is graded A by allk12, scoring above 88% of California public elementary schools once test results, poverty-adjusted performance, and the recent trend are combined.
Old Mill Elementary posts an average proficiency rate on state tests of 85.4%, compared with a predicted 77.3%. It is not in the top or bottom 10% of California schools on BeatsExpectations.
Recent Census Bureau figures for Marin County show that median household income is about $149,091, roughly 61% of adults have a four-year degree or more, and about 4% of residents live below the federal poverty line. Federal data list 75 public schools in Marin County, with a combined enrollment of about 29,867.
Nearest public school: Park Elementary, about 0.9 miles away. The five-mile area around Old Mill Elementary holds at least 8 other public schools. Old Mill Elementary's average proficiency of 85.4% compares with 75.6% for its nearest scored neighbors.
Federal records code the school's setting as Suburb: Large.
A comparison of 2020-21 and 2024-25 shows enrollment down 6%, from 278 to 261.
To ask about sports tryouts, band and choir, and theater, start a discussion on this page. Anyone with firsthand experience at this school can post or comment.
Marin County at a glance
View full county profilePopulation
257,969
Census ACS
Median income
$149,091
Household, ACS
Bachelor's+
61%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
75
29,867 students
Quick facts
Related schools
Other schools in Mill Valley Elementary
- Mill Valley MiddleMiddle · 721 students
- Edna Maguire ElementaryElementary · 399 students
- Tamalpais Valley ElementaryElementary · 368 students
- Park ElementaryElementary · 301 students
- Strawberry Point ElementaryElementary · 259 students
Other schools in Mill Valley
- Tamalpais HighHigh · 1,470 students
- Mill Valley MiddleMiddle · 721 students
- Edna Maguire ElementaryElementary · 399 students
- Tamalpais Valley ElementaryElementary · 368 students
- Park ElementaryElementary · 301 students
- Strawberry Point ElementaryElementary · 259 students
Other Old Mill Elementary schools
2 other US public schools in 3 states are named Old Mill Elementary. Old Mill Elementary is the 3rd largest of the 3.
- Old Mill Elementary SchoolMount Washington, KY · 591 students
- Old Mill Elementary SchoolSEA GIRT, NJ · 396 students
Nearby schools
- Park Elementary0.9 mi · 301
- Mill Valley Middle1.5 mi · 721
- Edna Maguire Elementary1.5 mi · 399
- Tamalpais High1.6 mi · 1,470
- Neil Cummins Elementary2.3 mi · 451
- San Andreas High (Continuation)2.5 mi · 46
Frequently asked questions
About Old Mill ElementaryHow many students attend Old Mill Elementary?
Old Mill Elementary enrolls approximately 261 students in grades KG-05.
What age range does Old Mill Elementary serve?
Old Mill Elementary serves students from grade KG through grade 05.
How many students per teacher at Old Mill Elementary?
Approximately 21.8:1 students per teacher at Old Mill Elementary.
How diverse is Old Mill Elementary?
Old Mill Elementary reports a student body of 70% White, 6% Hispanic, 3% Asian, 21% Two or more.
What district is Old Mill Elementary in?
Old Mill Elementary is part of Mill Valley Elementary.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.