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How has Las Lomas High changed in the last five years, for better or worse?
Community prompt from u/allk12. Replies below.
Enrollment
1,577
High
DISTRICT 1,080 · STATE 838
SCHOOL COMMUNITY·ACALANES UNION HIGH·NCES 060165000035
Las Lomas High
1460 South Main St., Walnut Creek, CA 94596 · (925) 280-3920 · Contra Costa County
GRADES 09–12HIGH13-CITYREGULAR SCHOOL1,577 STUDENTS
B
allk12 Grade
Scored higher than 63% of California public high schools
- ATest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- CBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- B-Three-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 high schools
Student : Teacher
19.5:1
81 FTE teachers
DISTRICT 17.5:1 · STATE 18.2:1
Free / Reduced Lunch
15%
243 students
DISTRICT 10% · STATE 65%
Community
6
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 370 | 23% |
| Grade 10 | 386 | 24% |
| Grade 11 | 388 | 25% |
| Grade 12 | 433 | 27% |
Student demographics
67%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 62% · 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
Test scores
CAASPP 2024-25 . % met or exceeded standardEnglish Language Arts
71.2%
CA avg 49.1% . -16.8pp since 2014
Math
56.5%
CA avg 37.7% . -6.5pp since 2014
What this means: On the CAASPP, California's statewide test, about 71 of every 100 students at this school read and write at grade level and about 56 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are down about 17 points since 2014, while math scores are down about 7 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 43.4% | 27.8% | 16.1% | 12.7% |
| Math | 29.8% | 26.6% | 18.2% | 25.3% |
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 | 71.2% | 56.5% |
| 2023-24 | 73.4% | 53.3% |
| 2022-23 | 77.1% | 54.1% |
| 2021-22 | 67.7% | 56.5% |
| 2020-21 | 82.7% | 65.9% |
| 2018-19 | 80.0% | 58.1% |
| 2017-18 | 77.2% | 58.8% |
| 2016-17 | 69.8% | 51.7% |
| 2015-16 | 71.0% | 54.0% |
| 2014-15 | 88.0% | 63.0% |
% 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
63.6%
composite math + reading, all grades
Predicted
70.5%
based on CA schools with similar FRL share
Beats by
-6.9pp
below demographic expectation
What this means: About 64% of students here test proficient in math and reading, compared with the roughly 71% 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 Las Lomas High
Las Lomas High's state test result (63.6% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Las Lomas High this school | 1,577 | 15.4% | 63.6% |
| Whitney High Rocklin | 2,041 | 20.9% | 58.8% |
| Torrey Pines High San Diego | 2,536 | 17.7% | 69.3% |
| Palos Verdes High Palos Verdes Estates | 1,484 | 8.4% | 70.8% |
| Westlake High Westlake Village | 1,900 | 17.7% | 59.0% |
| Northgate High Walnut Creek | 1,546 | 22.4% | 64.5% |
Matched among California high 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 Las Lomas High ranks
Among high schools| Measure | This school | In California | In Contra Costa County |
|---|---|---|---|
| State test proficiency ranked highest first | 63.6% | #141 of 1,052 | #10 of 28 |
| Math proficiency ranked highest first | 56.5% | #111 of 1,056 ▲ 14 | #8 of 28 no change |
| Reading proficiency ranked highest first | 71.2% | #222 of 1,056 ▼ 43 | #11 of 28 ▼ 2 |
| 3-year test score change ranked biggest gain first | +1.7pp | #544 of 1,044 | #11 of 28 |
| Enrollment ranked largest first | 1,577 | #531 of 2,093 | #13 of 54 |
| Students per teacher ranked fewest first | 19.5:1 | #472 of 1,352 | #10 of 41 |
| Diversity index ranked most diverse first | 66.6% | #214 of 1,351 | #16 of 41 |
| Free and reduced lunch ranked highest share first | 15.4% | #1,519 of 1,575 | #38 of 45 |
| Enrollment change since 2017-18 ranked fastest growth first | +1.8% | #266 of 327 | #4 of 6 |
Ranked against other public high 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
1,577
-3 (0%) vs 2020
+43% since 1990-91, when it was 1,105
Student : Teacher
19.5:1
was 19.5:1
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 | 1,577 | 80.9 | 19.5:1 | 15% (243) |
| 2023-24 | 1,568 | 78.3 | 20.0:1 | 14% (221) |
| 2022-23 | 1,571 | 79.7 | 19.7:1 | 12% (186) |
| 2020-21 | 1,580 | 81 | 19.5:1 | 12% (186) |
| 2017-18 | 1,549 | 75.6 | 20.5:1 | 13% (198) |
| 2015-16 | 1,528 | 75 | 20.4:1 | 9% (131) |
| 2010-11 | 1,468 | N/A | N/A | 8% (113) |
| 2000-01 | 1,471 | 66 | 22.3:1 | 1% (20) |
| 1990-91 | 1,105 | 46 | 24.0:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Las Lomas High.
Since 2017-18: students up 2% (1,549 to 1,577); teachers up 7% (75.6 to 80.9).
About Las Lomas High
Las Lomas High is a large high school in California, located in Walnut Creek. It had 1,577 students in 2024-25, spanning grades 9 through 12. High schools in California average about 838 students, which makes this school 88% larger than average.
Acalanes Union High enrolls 5,401 students, and its 5 schools include Las Lomas High.
More than half of enrollment at Las Lomas High is White: 51%. Other groups include 17% Asian, 17% Hispanic, 11% multiracial, and 3% Black. The county population is about 41% White. The diversity index for Las Lomas High is 67%. For US public schools as a whole it is 70%.
Classroom staffing at Las Lomas High totals 80.9 full-time-equivalent teachers, and the student-to-teacher ratio is 19.5:1. Compared with the 18.2:1 average for high schools in California, this school's ratio is higher. Federal data show 15% of students (243) are eligible for free or reduced-price lunch. Among public schools in Contra Costa County, the average eligibility rate is 45%.
Las Lomas High earns a B on the allk12 Grade, which blends test scores, results against poverty-based expectations, and the three-year trend. It scored higher than 63% of California public high schools.
Las Lomas High sits between the top and bottom 10% of California schools on BeatsExpectations, with an actual average proficiency rate across its state test results of 63.6% and a predicted 70.5%.
Contra Costa County is the school's county. There, the median household earns about $127,229 a year, about 45% of adults have at least a bachelor's degree, and roughly 6% of residents are in poverty. Contra Costa County has 280 public schools with about 167,423 students, including Las Lomas High.
Murwood Elementary, about 0.6 miles away, is the closest public school. Counting only straight-line distance, at least 8 other public schools are within five miles. Among the 8 closest schools with test data, this one included, Las Lomas High ranks 8th on average proficiency.
The National Center for Education Statistics classifies the school's location as City: Small, meaning it is inside a principal city with a population under 100,000.
Enrollment has been fairly stable: 1,580 in 2020-21 and 1,577 in 2024-25.
The discussion board for Las Lomas High is open to topics like pickup and drop-off, after-school programs, and teacher feedback. Teachers and staff are welcome to share updates too.
Contra Costa County at a glance
View full county profilePopulation
1,165,012
Census ACS
Median income
$127,229
Household, ACS
Bachelor's+
45%
Adults 25+
Poverty rate
6%
Below federal line
Schools in county
280
167,423 students
Quick facts
Related schools
Other schools in Acalanes Union High
- Campolindo HighHigh · 1,340 students
- Acalanes HighHigh · 1,256 students
- Miramonte HighHigh · 1,167 students
- Acalanes Center for Independent StudyHigh · 61 students
Other schools in Walnut Creek
- Northgate HighHigh · 1,546 students
- Foothill MiddleMiddle · 1,005 students
- Walnut Creek IntermediateMiddle · 940 students
- Walnut Acres ElementaryElementary · 689 students
- Bancroft ElementaryElementary · 672 students
- Buena Vista ElementaryElementary · 495 students
Nearby schools
- Murwood Elementary0.6 mi · 451
- Tice Creek0.6 mi · 451
- Parkmead Elementary0.7 mi · 478
- Walnut Heights Elementary1.0 mi · 427
- Walnut Creek Intermediate1.3 mi · 940
- Indian Valley Elementary1.4 mi · 355
Frequently asked questions
About Las Lomas HighHow many students attend Las Lomas High?
Las Lomas High enrolls approximately 1,577 students in grades 09-12.
Is Las Lomas High an elementary, middle, or high school?
Las Lomas High is a high school covering grades 09-12.
How many students per teacher at Las Lomas High?
Approximately 19.5:1 students per teacher at Las Lomas High.
What is the racial breakdown of students at Las Lomas High?
At Las Lomas High, the student body is approximately 51% White, 17% Hispanic, 3% Black, 17% Asian, 11% Two or more.
Is Las Lomas High public or private?
Las Lomas High is a public K-12 school, overseen by Acalanes Union High.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.