Enrollment
134
High
DISTRICT 167 · STATE 796
SCHOOL COMMUNITY·IRION COUNTY ISD·NCES 483036003400
Irion High School
301 N 3RD ST, MERTZON, TX 76941 · (325) 835-2881 · Irion County
GRADES 07–12HIGH42-RURALREGULAR SCHOOL134 STUDENTS
B-
allk12 Grade
Scored higher than 47% of Texas public high schools
- BTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- CBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Texas public high schools
Student : Teacher
7.2:1
19 FTE teachers
DISTRICT 8.8:1 · STATE 15.1:1
Free / Reduced Lunch
27%
36 students
DISTRICT 28% · STATE 65%
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 | 24 | 18% |
| Grade 8 | 24 | 18% |
| Grade 9 | 24 | 18% |
| Grade 10 | 19 | 14% |
| Grade 11 | 22 | 16% |
| Grade 12 | 21 | 16% |
Student demographics
45%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 41% · STATE 63% · 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 IRION COUNTY ISD. Attendance zones can vary; confirm enrollment with the district.
Test scores
STAAR 2025-26 . % Meets Grade Level or AboveReading
82.0%
TX avg 54.5% . +8.0pp since 2023
Mathematics
53.0%
TX avg 45.3% . -11.0pp since 2023
What this means: On the STAAR, Texas's statewide test, about 82 of every 100 students at this school read at grade level and about 53 of 100 do math at grade level. Across all Texas schools, those numbers are about 55 and 45. Reading scores are up about 8 points since 2023, while math scores are down about 11 points.
Performance levels, 2025-26
| Subject | Masters Grade Level | Meets Grade Level | Approaches Grade Level | Did Not Meet Grade Level |
|---|---|---|---|---|
| Reading | 27.0% | 55.0% | 11.0% | 7.0% |
| Mathematics | 12.0% | 41.0% | 33.0% | 14.0% |
Share of tested students at each STAAR level. Each student counts in one level, so a row adds to about 100%.
STAAR results by year
| School year | Reading | Mathematics |
|---|---|---|
| 2025-26 | 82.0% | 53.0% |
| 2024-25 | 78.0% | 47.0% |
| 2023-24 | 74.0% | 64.0% |
% Meets Grade Level or Above, all students and all tested grades.
Source: STAAR. 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
60.0%
composite math + reading, all grades
Predicted
62.2%
based on TX schools with similar FRL share
Beats by
-2.2pp
below demographic expectation
What this means: About 60% of students here test proficient in math and reading, compared with the roughly 62% typical for Texas 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 Texas'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 Irion High School
Irion High School's state test result (60.0% proficient) is higher than 1 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Irion High School this school | 134 | 26.9% | 60.0% |
| Round Top-Carmine High School CARMINE | 114 | 28.1% | 74.5% |
| Danbury High School DANBURY | 220 | 23.2% | 55.6% |
| Bosqueville High School WACO | 227 | 29.1% | 72.4% |
| Falls City High School FALLS CITY | 184 | 23.9% | 79.2% |
| Lyndon B Johnson High School JOHNSON CITY | 255 | 24.3% | 62.2% |
Matched among Texas 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 Irion High School ranks
Among high schools| Measure | This school | In Texas |
|---|---|---|
| State test proficiency ranked highest first | 60.0% | #484 of 1,385 |
| Math proficiency ranked highest first | 53.0% | #461 of 1,425 ▲ 66 |
| Reading proficiency ranked highest first | 82.0% | #145 of 1,425 ▲ 43 |
| Enrollment ranked largest first | 134 | #1,495 of 2,107 |
| Free and reduced lunch ranked highest share first | 26.9% | #1,394 of 1,522 |
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
134
-5 (-4%) vs 2020
+7% since 1990-91, when it was 125
Student : Teacher
7.2:1
was 9.3:1
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 | 134 | 18.7 | 7.2:1 | 27% (36) |
| 2023-24 | 137 | 18.6 | 7.4:1 | 36% (49) |
| 2022-23 | 122 | 17.6 | 6.9:1 | 39% (47) |
| 2020-21 | 139 | 15 | 9.3:1 | 42% (59) |
| 2017-18 | 132 | 18.8 | 7.0:1 | 28% (37) |
| 2015-16 | 176 | 18 | 9.8:1 | 44% (77) |
| 2010-11 | 172 | 18 | 9.6:1 | 41% (71) |
| 2000-01 | 188 | 18 | 10.4:1 | 37% (70) |
| 1990-91 | 125 | 14 | 8.9:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Irion High School.
Since 2017-18: students up 2% (132 to 134); teachers unchanged (18.8 to 18.7).
About Irion High School
Irion High School is a high school with a street address in MERTZON, Texas. The school serves 134 students in grades 7 through 12 in 2024-25. For comparison, high schools in Texas average about 796 students.
IRION COUNTY ISD is the district for Irion High School. It has 2 schools and 334 students.
At 67%, White students outnumber all other groups at Irion High School combined. After that, the student body is 32% Hispanic. Irion High School has a diversity index of 45%, compared with 70% for all US public school students.
The school employs the equivalent of 18.7 full-time teachers, for a ratio of 7.2:1. Among high schools in Texas, the typical ratio is 15.1:1. The free or reduced-price lunch share, often used to gauge student poverty, is 27%. Across public schools in Irion County, the average is about the same, 28%.
Irion High School is graded B- by allk12, scoring above 47% of Texas public high schools once test results, poverty-adjusted performance, and the recent trend are combined.
Irion High School sits between the top and bottom 10% of Texas schools on BeatsExpectations, with an actual average proficiency rate on state tests of 60.0% and a predicted 62.2%.
Recent Census Bureau figures for Irion County show that median household income is about $70,357, about 28% of adults have at least a bachelor's degree, and roughly 8% of residents are in poverty. Irion High School is one of 2 public schools in Irion County, which together enroll about 334 students.
Nearby, Irion Elementary School is less than a tenth of a mile away. Irion High School ranks 1st of 9 among nearby schools on average proficiency, with 60.0% against a local average of 44.0%.
The school's federal locale classification is Rural: Distant.
The number of students dropped from 139 to 134 over 4 years. By 2024-25, the school had 7.2 students per teacher, compared with 9.3 in 2020-21.
The discussion area below is open to posts about school events, clubs, and volunteer needs. Questions from prospective families are welcome too.
Irion County at a glance
View full county profilePopulation
1,409
Census ACS
Median income
$70,357
Household, ACS
Bachelor's+
28%
Adults 25+
Poverty rate
8%
Below federal line
Schools in county
2
334 students
Quick facts
Related schools
Nearby schools
- Irion Elementary School0.1 mi · 200
- Christoval Elementary School19.9 mi · 273
- Christoval High School20.2 mi · 342
- Lamar Elementary School21.5 mi · 579
- Bonham Elementary School21.6 mi · 571
- Texas Leadership of San Angelo22.4 mi · 1,490
Frequently asked questions
About Irion High SchoolHow large is Irion High School?
Irion High School enrolls approximately 134 students in grades 07-12.
Is Irion High School an elementary, middle, or high school?
Irion High School is a high school covering grades 07-12.
How many students per teacher at Irion High School?
Approximately 7.2:1 students per teacher at Irion High School.
What is the student diversity at Irion High School?
Student demographics at Irion High School are roughly 67% White, 32% Hispanic, 1% Two or more.
Who oversees Irion High School?
Irion High School is overseen by IRION COUNTY ISD in Irion County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.