Enrollment
154
High
DISTRICT 188 · STATE 834
SCHOOL COMMUNITY·TRI CITY CUSD 1·NCES 173945003991
Tri-City High School
324 W Charles St, Buffalo, IL 62515 · (217) 364-4530 · Sangamon County
GRADES 09–12HIGH42-RURALTITLE IREGULAR SCHOOL154 STUDENTS
Student : Teacher
12.8:1
12 FTE teachers
DISTRICT 12.0:1 · STATE 13.8:1
Free / Reduced Lunch
42%
65 students
DISTRICT 47% · STATE 56%
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 9 | 34 | 22% |
| Grade 10 | 39 | 25% |
| Grade 11 | 38 | 25% |
| Grade 12 | 43 | 28% |
Student demographics
19%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 15% · STATE 69% · 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
School pathway
Feeds from
Based on grade levels within Tri City CUSD 1. Attendance zones can vary; confirm enrollment with the district.
BeatsExpectations
Demographically-adjusted score · methodologyTier
UNDERPERFORMING
Bottom 10% of IL schools after controlling for student poverty
Actual proficiency
32.7%
composite math + reading, all grades
Predicted
47.1%
based on IL schools with similar FRL share
Beats by
-14.4pp
below demographic expectation
What this means: About 33% of students here test proficient in math and reading, below the roughly 47% typical for Illinois schools with a similar share of low-income students. BeatsExpectations compares each school with others at the same poverty level, not by raw scores, so a school lands here when its results trail those comparable schools, which is not the same as having low scores. A higher-scoring school can still fall in this tier if similar schools score higher still.
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 Tri-City High School
Tri-City High School's state test result (32.7% proficient) is higher than 1 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Tri-City High School this school | 154 | 42.2% | 32.7% |
| Blue Ridge High School Farmer City | 155 | 42.6% | 38.4% |
| Mount Pulaski High School Mount Pulaski | 178 | 41.6% | 35.5% |
| Galva Jr-Sr High School Galva | 191 | 41.4% | 38.9% |
| Chadwick-Milledgeville Jr High School Milledgeville | 183 | 43.2% | 54.6% |
| Oblong High School Oblong | 165 | 44.8% | 28.2% |
Matched among Illinois 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 Tri-City High School ranks
Among high schools| Measure | This school | In Illinois | In Sangamon County |
|---|---|---|---|
| State test proficiency ranked highest first | 32.7% | #314 of 573 | #7 of 9 |
| Enrollment ranked largest first | 154 | #594 of 708 | #12 of 12 |
| Free and reduced lunch ranked highest share first | 42.2% | #378 of 578 | #4 of 9 |
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
154
-8 (-5%) vs 2020
-16% since 1990-91, when it was 183
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 | 154 | 12.1 | 12.8:1 | 42% (65) |
| 2023-24 | 153 | 12.5 | 12.2:1 | 44% (67) |
| 2022-23 | 170 | 12 | 14.2:1 | 36% (62) |
| 2020-21 | 162 | N/A | N/A | N/A |
| 2017-18 | 139 | 14 | 9.9:1 | 33% (46) |
| 2015-16 | 147 | 15 | 9.8:1 | 25% (37) |
| 2010-11 | 166 | 11 | 15.1:1 | 30% (49) |
| 2000-01 | 198 | 17 | 11.7:1 | N/A |
| 1990-91 | 183 | 18 | 10.2:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Tri-City High School.
Since 2017-18: students up 11% (139 to 154); teachers down 14% (14 to 12.1).
About Tri-City High School
Students in Buffalo, Illinois, attend Tri-City High School, a very small high school. It reported 154 students in grades 9 through 12 in 2024-25. That compares with an average of about 834 students for high schools in Illinois.
Tri City CUSD 1 (3 schools, 564 students) runs Tri-City High School.
By race and ethnicity, Tri-City High School is 90% White. Other groups include 5% multiracial and 3% Hispanic. The county population is about 78% White. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 19%.
The school's 12.1 full-time-equivalent teachers translate to a student-to-teacher ratio of 12.8:1. High schools in Illinois average 13.8:1, 1.0 more students per teacher than here. Income data for the school show 42% of students eligible for free or reduced-price lunch.
On allk12's BeatsExpectations measure, Tri-City High School is among the bottom 10% of schools in Illinois. Predicted: 47.1%. Actual: 32.7%.
The county, Sangamon County, is where the school is located. Median household income comes to about $75,357, a bachelor's degree or higher is held by about 37% of adults, and the poverty rate is about 9%. The county has 77 public schools and about 27,345 students.
Tri-City Elementary School, less than a tenth of a mile away, is the closest public school. Other public schools within five miles number 2. The average proficiency across nearby scored schools is 43.9%; Tri-City High School's is 32.7%, ranking 8th of 9.
Tri-City High School falls in the Rural: Distant locale category, used for schools in rural territory some distance from an urban area.
From 2020-21 to 2024-25, enrollment decreased from 162 to 154, a 5% decline.
The Tri-City High School discussion page is a place for open houses, carpools, and field trips. You can also rate the school on this page.
Sangamon County at a glance
View full county profilePopulation
194,947
Census ACS
Median income
$75,357
Household, ACS
Bachelor's+
37%
Adults 25+
Poverty rate
9%
Below federal line
Schools in county
77
27,345 students
Quick facts
Related schools
Other schools in Tri City CUSD 1
- Tri-City Elementary SchoolElementary · 273 students
- Tri-City Jr High SchoolMiddle · 137 students
Other schools in Buffalo
- Tri-City Elementary SchoolElementary · 273 students
- Tri-City Jr High SchoolMiddle · 137 students
Nearby schools
- Tri-City Elementary School0.0 mi · 273
- Tri-City Jr High School0.0 mi · 137
- Riverton Middle School6.3 mi · 347
- Riverton Elementary School6.7 mi · 515
- Riverton High School7.0 mi · 357
- Rochester Intermediate School8.9 mi · 394
Frequently asked questions
About Tri-City High SchoolHow large is Tri-City High School?
Tri-City High School enrolls approximately 154 students in grades 09-12.
Is Tri-City High School an elementary, middle, or high school?
Tri-City High School is a high school covering grades 09-12.
How many teachers does Tri-City High School have?
Tri-City High School employs 12 FTE teachers, for a student-to-teacher ratio of 12.8:1.
What is the student diversity at Tri-City High School?
Student demographics at Tri-City High School are roughly 90% White, 3% Hispanic, 1% Black, 1% Asian, 5% Two or more.
Is Tri-City High School public or private?
Tri-City High School is a public K-12 school, overseen by Tri City CUSD 1.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.