Enrollment
281
High
DISTRICT 149 · STATE 573
SCHOOL COMMUNITY·MOSSYROCK SCHOOL DISTRICT·NCES 530525000796
Mossyrock Jr./Sr. High School
295 WILLIAMS ST, MOSSYROCK, WA 98564 · (360) 983-3183 · Lewis County
GRADES 07–12HIGH42-RURALTITLE IREGULAR SCHOOL281 STUDENTS
C+
allk12 Grade
Scored higher than 38% of Washington public high schools
- CTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- BBeats 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 Washington public high schools
Student : Teacher
14.8:1
19 FTE teachers
DISTRICT 11.7:1 · STATE 21.6:1
Free / Reduced Lunch
62%
174 students
DISTRICT 72% · STATE 51%
Community
0
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 7 | 48 | 17% |
| Grade 8 | 50 | 18% |
| Grade 9 | 37 | 13% |
| Grade 10 | 49 | 17% |
| Grade 11 | 52 | 19% |
| Grade 12 | 45 | 16% |
Student demographics
50%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 45% · STATE 68% · 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
QUIET COMMUNITY
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START A DISCUSSIONTest scores
Smarter Balanced + WCAS 2024-25 . % Met or Exceeded StandardEnglish Language Arts
53.1%
WA avg 58.4% . -0.6pp since 2014
Math
20.8%
WA avg 51.2% . -19.2pp since 2014
What this means: On the Smarter Balanced + WCAS, Washington's statewide test, about 53 of every 100 students at this school read and write at grade level and about 21 of 100 do math at grade level. Across all Washington schools, those numbers are about 58 and 51. Reading and writing scores have held steady since 2014, while math scores are down about 19 points.
Smarter Balanced + WCAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 53.1% | 20.8% |
| 2023-24 | 44.9% | 15.3% |
| 2022-23 | 47.5% | 18.8% |
| 2021-22 | 48.1% | 28.6% |
| 2018-19 | 65.5% | 53.5% |
| 2017-18 | 62.0% | 41.7% |
| 2016-17 | 48.8% | 31.8% |
| 2015-16 | 51.2% | 41.0% |
| 2014-15 | 53.8% | 40.0% |
% Met or Exceeded Standard, all students and all tested grades.
Source: Smarter Balanced + WCAS. 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
35.7%
composite math + reading, all grades
Predicted
38.7%
based on WA schools with similar FRL share
Beats by
-2.9pp
below demographic expectation
What this means: About 36% of students here test proficient in math and reading, compared with the roughly 39% typical for Washington 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 Washington'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 Mossyrock Jr./Sr. High School
Mossyrock Jr./Sr. High School's state test result (35.7% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Mossyrock Jr./Sr. High School this school | 281 | 61.9% | 35.7% |
| Winlock Senior High WINLOCK | 226 | 60.2% | 35.5% |
| Ocosta Junior - Senior High Westport | 272 | 65.4% | 35.9% |
| Raymond Jr Sr High School RAYMOND | 240 | 67.1% | 25.5% |
| Okanogan High School Okanogan | 308 | 56.2% | 51.1% |
| Elma High School Elma | 578 | 62.5% | 44.9% |
Matched among Washington 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 Mossyrock Jr./Sr. High School ranks
Among high schools| Measure | This school | In Washington | In Lewis County |
|---|---|---|---|
| State test proficiency ranked highest first | 35.7% | #193 of 271 | #5 of 10 |
| Math proficiency ranked highest first | 20.8% | #230 of 321 ▲ 23 | #9 of 10 no change |
| Reading proficiency ranked highest first | 53.1% | #208 of 327 ▲ 56 | #4 of 11 ▲ 3 |
| 3-year test score change ranked biggest drop first | -1.4pp | #118 of 259 | #7 of 10 |
| Enrollment ranked largest first | 281 | #273 of 570 | #5 of 17 |
| Students per teacher ranked fewest first | 14.8:1 | #20 of 311 | #1 of 9 |
| Diversity index ranked most diverse first | 50.3% | #203 of 316 | #2 of 9 |
| Free and reduced lunch ranked highest share first | 61.9% | #107 of 386 | #3 of 12 |
| Enrollment change since 2017-18 ranked fastest growth first | +26.6% | #12 of 136 | N/A |
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
281
+38 (+16%) vs 2020
+98% since 1990-91, when it was 142
Student : Teacher
14.8:1
was 16.2:1
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 | 281 | 19 | 14.8:1 | 62% (174) |
| 2023-24 | 279 | 16.2 | 17.3:1 | 66% (183) |
| 2022-23 | 273 | 14.8 | 18.5:1 | 68% (186) |
| 2020-21 | 243 | 15 | 16.2:1 | 54% (131) |
| 2017-18 | 222 | 12.6 | 17.6:1 | 59% (131) |
| 2015-16 | 218 | 14 | 15.6:1 | 58% (127) |
| 2010-11 | 302 | 17 | 17.8:1 | 49% (149) |
| 2000-01 | 298 | 18 | 16.6:1 | N/A |
| 1990-91 | 142 | 16 | 8.9:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Mossyrock Jr./Sr. High School.
Since 2017-18: students up 27% (222 to 281); teachers up 50% (12.6 to 19).
About Mossyrock Jr./Sr. High School
Mossyrock Jr./Sr. High School is a low-enrollment high school in Washington, with an address in MOSSYROCK. Classes run from 7 through 12, and the school has 281 students. Against the 573-student average for high schools in Washington, enrollment here is 51% lower.
Mossyrock School District has 644 students spread across 3 schools.
At Mossyrock Jr./Sr. High School, White students make up 63% of the student body. The school is also 31% Hispanic and 4% multiracial. That is lower than the 82% White share among all Lewis County residents. Mossyrock Jr./Sr. High School's diversity index is 50%, against a US figure of 70%.
Staffing totals 19 full-time-equivalent teachers, and the student-to-teacher ratio is 14.8:1. That is lower than the 21.6:1 average for high schools in Washington. A measure often used for student poverty, free or reduced-price lunch eligibility, stands at 62%.
Mossyrock Jr./Sr. High School is graded C+ by allk12, scoring above 38% of Washington public high schools once test results, poverty-adjusted performance, and the recent trend are combined.
On BeatsExpectations, Mossyrock Jr./Sr. High School is 2.9 points below its prediction, a result in the middle 80% of Washington schools.
Across Lewis County, the median household income is $74,796, the share of adults with a bachelor's degree or higher is 22%, and about 8% of people live in poverty. In all, Lewis County has 45 public schools and roughly 12,548 students.
Mossyrock Elementary School is the closest public school, less than a tenth of a mile away in a straight line. In all, 2 other public schools sit within five miles of Mossyrock Jr./Sr. High School. On state test proficiency, Mossyrock Jr./Sr. High School ranks 7th in a group of 8 nearby schools.
Federal records code the school's setting as Rural: Distant.
2024-25 enrollment was 281, a 16% rise from 243 in 2020-21. The school's ratio fell from 16.2:1 to 14.8:1 between 2020-21 and 2024-25.
Posts about school events, clubs, and volunteer needs are welcome on this page. Reviews and ratings from people who know the school are welcome.
Lewis County at a glance
View full county profilePopulation
85,154
Census ACS
Median income
$74,796
Household, ACS
Bachelor's+
22%
Adults 25+
Poverty rate
8%
Below federal line
Schools in county
45
12,548 students
Quick facts
Related schools
Other schools in Mossyrock School District
- Mossyrock Elementary SchoolElementary · 347 students
- Mossyrock AcademyHigh · 16 students
Other schools in MOSSYROCK
- Mossyrock Elementary SchoolElementary · 347 students
- Mossyrock AcademyHigh · 16 students
Nearby schools
- Mossyrock Elementary School0.1 mi · 347
- Mossyrock Academy0.2 mi · 16
- Morton Elementary School10.0 mi · 194
- Morton Junior-Senior High10.3 mi · 205
- Onalaska Middle School11.6 mi · 195
- Onalaska High School11.6 mi · 281
Frequently asked questions
About Mossyrock Jr./Sr. High SchoolWhat is the total enrollment at Mossyrock Jr./Sr. High School?
Mossyrock Jr./Sr. High School enrolls approximately 281 students in grades 07-12.
What grades does Mossyrock Jr./Sr. High School serve?
Mossyrock Jr./Sr. High School serves grades 07-12.
How many students per teacher at Mossyrock Jr./Sr. High School?
Approximately 14.8:1 students per teacher at Mossyrock Jr./Sr. High School.
How diverse is Mossyrock Jr./Sr. High School?
Mossyrock Jr./Sr. High School reports a student body of 63% White, 31% Hispanic, 1% Black, 4% Two or more.
Who oversees Mossyrock Jr./Sr. High School?
Mossyrock Jr./Sr. High School is overseen by Mossyrock School District in Lewis County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.