Enrollment
2,152
Washington · 2024-25 NCES data
High school (grades 9-12) · Snoqualmie, WA
Mount Si High School
Federal NCES profile for Mount Si High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 47/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 530804001330
👥 S:T ratio 16
📚 AP courses 100
🌟 Gifted program 30
🎓 Counselors 28
📋 Attendance 62
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mount Si High School earns 47/100 on the Resource Investment Index, with class sizes larger than 84% of Washington schools. It is also one of the largest schools in Washington.
- #5 of 6
- public schools in Snoqualmie · Resource Index
- 47
- Resource Index · Typical
- 21.1:1
- large classes for Washington
- 9.5%
- free-lunch eligible
Mount Si High School has class sizes larger than 84% of Washington schools. Computed live against every Washington school reporting to NCES.
By Resource Investment Index, Mount Si High School ranks #5 of 6 public schools in Snoqualmie, WA.
School address
District: Snoqualmie Valley School District · Washington
NCES ID 530804001330 Verify on NCES CCD record →
Teachers (FTE)
102.0
Federal CCD staff survey
Students per teacher
21.1:1
vs 17.6:1 Washington avg
+20% vs state
Free-lunch eligible
9.5%
vs 45.0% Washington avg
-79% vs state
Student-teacher ratio in context
How Mount Si High School compares with Washington and U.S. medians
What stands out at Mount Si High School
Mount Si High School is a lower-poverty, large high school in Snoqualmie, Washington, enrolling 2,152 students.
Class loads run somewhat heavier than typical: 21.1:1 puts it in the larger third of Washington schools by student-teacher ratio.
Comparatively few students face economic hardship here, 9.5% free-meal eligibility runs 79% below the Washington average.
By headcount it is one of the larger campuses in Washington, bigger than 99% of state schools at 2,152 students.
Its Resource Investment Index lands in the lower third of 2,394 scored Washington schools.
Among 39 similarly sized, similarly resourced-need Washington schools statewide, it ranks #34, in the lower tier once campus size and economic need are matched.
Its student body is led by White (71%) and Hispanic or Latino (11%) (diversity index 47/100).
On the academic-pipeline side it reports 27 Advanced Placement courses.
Counselor availability sits well past the ASCA benchmark, roughly 359 students sharing each counselor, though short of the most stretched campuses.
15.1% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The federal civil-rights collection also records 8 expulsions at this campus for 2021-22.
Among Snoqualmie's high schools, it stands alongside Two Rivers School (56 students): Mount Si High School is larger than that campus by headcount and runs heavier classes (21.1:1 vs 9.3:1).
Snoqualmie Valley School District also operates Timber Ridge Elementary School (607 students) and Edwin R Opstad Elementary (581 students) alongside Mount Si High School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Mount Si High School compares
Mount Si High School on the metrics families compare, against Washington and U.S. means.
| Metric | This school | vs Washington | Washington avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.1:1 | ▲ 20% | 17.6:1 | 15.7:1 |
| Free-lunch eligible | 9.5% | ▼ 79% | 45.0% | 51.7% |
| Enrollment | 2,152 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.1:1
Leaner classes than 13% of US schools, heavier class loads than most.
2,152
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
9.5%
free-lunch eligible
- 79% below the Washington average of 45.0%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
21.1:1
students per teacher
- 20% above state mean
Top 84% in Washington - lower ratio than 16% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
15.1%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$15,815
per pupil, district-wide
- below Washington avg of $19,487
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors6.0 FTE
Per 359 students, the combined health-and-guidance staffing load for this school.
Discipline context
38
in-school suspensions + 20 out-of-school
Suspension rate: 1.8 per 100 students. Combined in-school and out-of-school rate: 2.7 per 100 students. Reported via the Civil Rights Data Collection. Includes 8 expulsions.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 70.9%
Hispanic or Latino 10.8%
Asian 8.9%
Two or More 7.3%
African American 1.1%
American Indian / Alaska Native 0.7%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 70.9% of enrollment.
Student-body diversity index 47.2/100
Simpson diversity index - at 47.2, Mount Si High School is less mixed than the Washington school average of 53.3.
Programs
AP courses offered 27
Funding & spending
District-wide per-pupil expenditure for Snoqualmie Valley School District, which includes Mount Si High School.
$15,815
Per student
-19%
vs Washington
Avg $19,487
-5%
vs U.S.
Avg $16,593
Revenue mix
Local 34.7%
State 60.5%
Federal 4.8%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Mount Si High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Timber Ridge Elementary School | Smaller | Similar economic need | Lower S:T ratio |
| Edwin R Opstad Elementary | Smaller | Similar economic need | Lower S:T ratio |
| Twin Falls Middle School | Smaller | Similar economic need | Lower S:T ratio |
| Snoqualmie Elementary | Smaller | Similar economic need | Lower S:T ratio |
| Chief Kanim Middle School | Smaller | Similar economic need | Lower S:T ratio |
Comparisons are relative to Mount Si High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 607
- Students per teacher
- 14.1:1
- Resource Index
- 48/100
- Enrollment
- 581
- Students per teacher
- 16.1:1
- Resource Index
- 46/100
- Enrollment
- 556
- Students per teacher
- 17.9:1
- Resource Index
- 53/100
- Enrollment
- 547
- Students per teacher
- 15.6:1
- Resource Index
- 45/100
- Enrollment
- 520
- Students per teacher
- 16.8:1
- Resource Index
- 51/100
Similar high schools in Snoqualmie
1 comparable high schools (grades 9-12) serving the same city.
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Washington, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~2,152 students)
Similar student-teacher ratio (~21.1:1)
Next steps
Verify locally before acting on Mount Si High School's federal record.
- Compare Mount Si High School against another school. Compare schools
- Snoqualmie Valley School District's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Mount Si High School
How many students attend Mount Si High School?
Mount Si High School has 2,152 students enrolled. It is a high school in Snoqualmie, WA.
What is the student-teacher ratio at Mount Si High School?
The student-teacher ratio at Mount Si High School is 21.1:1, which is 20% higher than the Washington average of 17.6:1 and 34% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Mount Si High School?
9.5% of students at Mount Si High School are eligible for free lunch, compared to the Washington average of 45.0%.
What is the racial and ethnic makeup of Mount Si High School?
The largest demographic group at Mount Si High School is White at 70.9% of enrollment, in Snoqualmie, WA.
What is the Resource Investment Index for Mount Si High School?
Mount Si High School has a Resource Investment Index of 47/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mount Si High School rank among public schools in Snoqualmie?
By Resource Investment Index, Mount Si High School ranks #5 of 6 public schools in Snoqualmie, WA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Snoqualmie on the city page.
Is Mount Si High School a good school?
Mount Si High School earns 47/100 on the Resource Investment Index, with class sizes larger than 84% of Washington schools. It is also one of the largest schools in Washington. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Snoqualmie Valley School District?
Besides Mount Si High School, Snoqualmie Valley School District also operates Timber Ridge Elementary School (607 students), Edwin R Opstad Elementary (581 students), and Twin Falls Middle School (556 students). See the Snoqualmie Valley School District district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.