Enrollment
480
Oregon · 2024-25 NCES data
Other / mixed grade configuration · West Linn, OR
Trillium Creek Primary School
Federal NCES profile for Trillium Creek Primary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 39/100.
2024-25 NCES dataOther / mixed grade configurationNCES 411317001825
👥 S:T ratio 20
🌟 Gifted program 70
🎓 Counselors 4
📋 Attendance 64
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Trillium Creek Primary School earns 39/100 on the Resource Investment Index, with class sizes larger than 78% of Oregon schools.
- #6 of 6
- schools in West Linn · Resource Index
- 39
- Resource Index · Typical
- 20:1
- large classes for Oregon
- 4.4%
- free-lunch eligible
Trillium Creek Primary School has class sizes larger than 78% of Oregon schools. Computed live against every Oregon school reporting to NCES.
By Resource Investment Index, Trillium Creek Primary School ranks #6 of 6 schools in West Linn, OR.
School address
District: West Linn-Wilsonville Sd 3j · Oregon
NCES ID 411317001825 Verify on NCES CCD record →
Teachers (FTE)
24.0
Federal CCD staff survey
Students per teacher
20:1
vs 17.6:1 Oregon avg
+14% vs state
Free-lunch eligible
4.4%
vs 52.8% Oregon avg
-92% vs state
Student-teacher ratio in context
How Trillium Creek Primary School compares with Oregon and U.S. medians
What stands out at Trillium Creek Primary School
Trillium Creek Primary School is a lower-poverty, mid-sized combined-grade school in West Linn, Oregon, enrolling 480 students.
Class loads run somewhat heavier than typical: 20:1 puts it in the larger third of Oregon schools by student-teacher ratio.
Comparatively few students face economic hardship here, 4.4% free-meal eligibility runs 92% below the Oregon average.
Enrollment of 480 puts it in the larger third of Oregon schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 1,273 scored Oregon schools.
Against 66 statewide peers matched on enrollment and economic need, it ranks mid-pack at #47.
Its student body is led by White (73%) and Two or More (12%) (diversity index 44/100).
Counselor access is stretched at roughly 480 students per counselor, well above the ASCA-recommended 250:1 ceiling.
14.6% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding West Linn-Wilsonville Sd 3j spends $13,465 per pupil, 26% below the Oregon average, a leaner-resourced district than most.
Among West Linn's public schools, it stands alongside Willamette Primary School (384 students): Trillium Creek Primary School is larger than that campus by headcount and runs heavier classes (20:1 vs 17.5:1).
West Linn-Wilsonville Sd 3j also operates West Linn High School (1,809 students) and Wilsonville High School (1,258 students) alongside Trillium Creek Primary 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 Trillium Creek Primary School compares
Trillium Creek Primary School on the metrics families compare, against Oregon and U.S. means.
| Metric | This school | vs Oregon | Oregon avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 20:1 | ▲ 14% | 17.6:1 | 15.7:1 |
| Free-lunch eligible | 4.4% | ▼ 92% | 52.8% | 51.7% |
| Enrollment | 480 | top 25% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
20:1
Leaner classes than 16% of US schools, heavier class loads than most.
480
Bigger than 59% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
4.4%
free-lunch eligible
- 92% below the Oregon average of 52.8%
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
20:1
students per teacher
- 14% above state mean
Top 78% in Oregon - lower ratio than 22% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
14.6%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$13,465
per pupil, district-wide
- below Oregon avg of $18,086
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 480 students, the combined health-and-guidance staffing load for this school.
Discipline context
1
in-school suspensions + 2 out-of-school
Suspension rate: 0.2 per 100 students. Combined in-school and out-of-school rate: 0.6 per 100 students. Reported via the Civil Rights Data Collection.
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 72.9%
Two or More 11.7%
Hispanic or Latino 9.4%
Asian 5.0%
African American 1.0%
Largest group: White at 72.9% of enrollment.
Student-body diversity index 44.3/100
Simpson diversity index - at 44.3, Trillium Creek Primary School is less mixed than the Oregon school average of 47.1.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for West Linn-Wilsonville Sd 3j, which includes Trillium Creek Primary School.
$13,465
Per student
-26%
vs Oregon
Avg $18,086
-19%
vs U.S.
Avg $16,593
Revenue mix
Local 50.1%
State 46.8%
Federal 3.1%
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 Trillium Creek Primary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| West Linn High School | Larger | Similar economic need | Higher S:T ratio |
| Wilsonville High School | Larger | Higher economic need | Similar S:T ratio |
| Rosemont Ridge Middle School | Larger | Similar economic need | Similar S:T ratio |
| Boeckman Creek Primary School | Similar size | Higher economic need | Lower S:T ratio |
| Lowrie Primary School | Similar size | Higher economic need | Similar S:T ratio |
Comparisons are relative to Trillium Creek Primary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,809
- Students per teacher
- 22.1:1
- Resource Index
- 27/100
- Enrollment
- 1,258
- Students per teacher
- 19.7:1
- Resource Index
- 32/100
- Enrollment
- 699
- Students per teacher
- 19.4:1
- Resource Index
- 38/100
- Enrollment
- 488
- Students per teacher
- 16.8:1
- Resource Index
- 26/100
- Enrollment
- 482
- Students per teacher
- 19.3:1
- Resource Index
- 32/100
Similar other schools in West Linn
5 comparable other schools (grades Mixed) serving the same city.
Willamette Primary School
Standard public school
384 students 17.5:1 students per teacher
Sunset Primary School
Standard public school
375 students 19.7:1 students per teacher
Cedaroak Park Primary School
Standard public school
348 students 18.3:1 students per teacher
Stafford Primary School
Standard public school
323 students 17:1 students per teacher
Bolton Primary School
Standard public school
222 students 15.9:1 students per teacher
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Oregon, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~480 students)
Next steps
Verify locally before acting on Trillium Creek Primary School's federal record.
- Compare Trillium Creek Primary School against another school. Compare schools
- West Linn-Wilsonville Sd 3j'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 Trillium Creek Primary School
How many students attend Trillium Creek Primary School?
Trillium Creek Primary School has 480 students enrolled. It is a public school in West Linn, OR.
What is the student-teacher ratio at Trillium Creek Primary School?
The student-teacher ratio at Trillium Creek Primary School is 20:1, which is 14% higher than the Oregon average of 17.6:1 and 27% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Trillium Creek Primary School?
4.4% of students at Trillium Creek Primary School are eligible for free lunch, compared to the Oregon average of 52.8%.
What is the racial and ethnic makeup of Trillium Creek Primary School?
The largest demographic group at Trillium Creek Primary School is White at 72.9% of enrollment, in West Linn, OR.
What is the Resource Investment Index for Trillium Creek Primary School?
Trillium Creek Primary School has a Resource Investment Index of 39/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Trillium Creek Primary School rank among schools in West Linn?
By Resource Investment Index, Trillium Creek Primary School ranks #6 of 6 schools in West Linn, OR. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in West Linn on the city page.
Is Trillium Creek Primary School a good school?
Trillium Creek Primary School earns 39/100 on the Resource Investment Index, with class sizes larger than 78% of Oregon schools. 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 West Linn-Wilsonville Sd 3j?
Besides Trillium Creek Primary School, West Linn-Wilsonville Sd 3j also operates West Linn High School (1,809 students), Wilsonville High School (1,258 students), and Rosemont Ridge Middle School (699 students). See the West Linn-Wilsonville Sd 3j 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.