Enrollment
180
Wisconsin · 2024-25 NCES data
High school (grades 9-12) · Plainfield, WI
Tri-County High
Federal NCES profile for Tri-County High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 35/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 551182001548
👥 S:T ratio 55
📚 AP courses 25
🌟 Gifted program 30
🎓 Counselors 52
📋 Attendance 14
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Tri-County High earns 35/100 on the Resource Investment Index, with class sizes smaller than 77% of Wisconsin schools.
- #2 of 3
- public schools in Plainfield · Resource Index
- 35
- Resource Index · Typical
- 11.3:1
- small classes for Wisconsin
- 47.5%
- free-lunch eligible
Tri-County High has class sizes smaller than 77% of Wisconsin schools. Computed live against every Wisconsin school reporting to NCES.
By Resource Investment Index, Tri-County High ranks #2 of 3 public schools in Plainfield, WI.
School address
District: Tri-County Area School District · Wisconsin
NCES ID 551182001548 Verify on NCES CCD record →
Teachers (FTE)
16.0
Federal CCD staff survey
Students per teacher
11.3:1
vs 14.4:1 Wisconsin avg
-22% vs state
Free-lunch eligible
47.5%
vs 38.5% Wisconsin avg
+23% vs state
Student-teacher ratio in context
How Tri-County High compares with Wisconsin and U.S. medians
What stands out at Tri-County High
Tri-County High is a mid-sized high school in Plainfield, Wisconsin, enrolling 180 students.
Class sizes run a bit leaner than typical: 11.3:1 puts it in the smaller third of Wisconsin schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 47.5% of students eligible for free meals.
Enrollment of 180 puts it in the smaller third of Wisconsin schools by headcount.
Its Resource Investment Index lands in the lower third of 2,202 scored Wisconsin schools.
Among 230 similarly sized, similarly resourced-need Wisconsin schools statewide, it ranks #164, in the lower tier once campus size and economic need are matched.
Its student body is led by White (67%) and Hispanic or Latino (28%) (diversity index 47/100).
On the academic-pipeline side it reports 5 Advanced Placement courses.
Counselor coverage is strong, about 240 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 34.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Its district draws 17.8% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
The federal civil-rights collection also records 4 expulsions at this campus for 2021-22.
Tri-County Area School District also operates Tri-County Elementary (265 students) and Tri-County Middle (134 students) alongside Tri-County High.
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 Tri-County High compares
Tri-County High on the metrics families compare, against Wisconsin and U.S. means.
| Metric | This school | vs Wisconsin | Wisconsin avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.3:1 | ▼ 22% | 14.4:1 | 15.7:1 |
| Free-lunch eligible | 47.5% | ▲ 23% | 38.5% | 51.7% |
| Enrollment | 180 | top 73% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.3:1
Leaner classes than 81% of US schools, among the more generously staffed nationally.
180
Bigger than 17% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
47.5%
free-lunch eligible
- 23% above the Wisconsin average of 38.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
11.3:1
students per teacher
- 22% below state mean
Top 23% in Wisconsin - lower ratio than 77% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
34.4%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$15,993
per pupil, district-wide
- above Wisconsin avg of $14,919
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors0.8 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
11
in-school suspensions + 12 out-of-school
Suspension rate: 6.1 per 100 students. Combined in-school and out-of-school rate: 12.8 per 100 students. Reported via the Civil Rights Data Collection. Includes 4 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 67.2%
Hispanic or Latino 28.3%
Asian 2.2%
Native Hawaiian / Pacific Islander 1.7%
Two or More 0.6%
Largest group: White at 67.2% of enrollment.
Student-body diversity index 46.8/100
Simpson diversity index - at 46.8, Tri-County High is more mixed than the Wisconsin school average of 35.7.
Programs
AP courses offered 5
Funding & spending
District-wide per-pupil expenditure for Tri-County Area School District, which includes Tri-County High.
$15,993
Per student
+7%
vs Wisconsin
Avg $14,919
-4%
vs U.S.
Avg $16,593
Revenue mix
Local 31.9%
State 50.3%
Federal 17.8%
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 Tri-County High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Tri-County Elementary | Larger | Similar economic need | Similar S:T ratio |
| Tri-County Middle | Smaller | Similar economic need | Higher S:T ratio |
Comparisons are relative to Tri-County High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 265
- Students per teacher
- 12:1
- Resource Index
- 42/100
- Enrollment
- 134
- Students per teacher
- 13.4:1
- Resource Index
- 33/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Wisconsin, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~180 students)
Similar student-teacher ratio (~11.3:1)
Next steps
Verify locally before acting on Tri-County High's federal record.
- Compare Tri-County High against another school. Compare schools
- Tri-County Area 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 Tri-County High
How many students attend Tri-County High?
Tri-County High has 180 students enrolled. It is a high school in Plainfield, WI.
What is the student-teacher ratio at Tri-County High?
The student-teacher ratio at Tri-County High is 11.3:1, which is 22% lower than the Wisconsin average of 14.4:1 and 28% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Tri-County High?
47.5% of students at Tri-County High are eligible for free lunch, compared to the Wisconsin average of 38.5%.
What is the racial and ethnic makeup of Tri-County High?
The largest demographic group at Tri-County High is White at 67.2% of enrollment, in Plainfield, WI.
What is the Resource Investment Index for Tri-County High?
Tri-County High has a Resource Investment Index of 35/100 (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 Tri-County High rank among public schools in Plainfield?
By Resource Investment Index, Tri-County High ranks #2 of 3 public schools in Plainfield, WI. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Plainfield on the city page.
Is Tri-County High a good school?
Tri-County High earns 35/100 on the Resource Investment Index, with class sizes smaller than 77% of Wisconsin 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 Tri-County Area School District?
Besides Tri-County High, Tri-County Area School District also operates Tri-County Elementary (265 students) and Tri-County Middle (134 students). See the Tri-County Area 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.