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SCHOOL COMMUNITY·SAN MARCOS CISD·NCES 483897004452

San Marcos High School

2601 RATTLER RD, SAN MARCOS, TX 78666 · (512) 393-6805 · Hays County
GRADES 09–12HIGH13-CITYTITLE IREGULAR SCHOOL2,371 STUDENTS
C-
allk12 Grade
Scored higher than 18% of Texas public high schools
  • C-Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
  • C-Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
  • B+Three-year trend Change in reading and math proficiency over the last three test years.

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

Enrollment
2,371
High
DISTRICT 1,213 · STATE 796
Student : Teacher
14.8:1
160 FTE teachers
DISTRICT 14.3:1 · STATE 15.1:1
Free / Reduced Lunch
73%
1,737 students
DISTRICT 79% · STATE 65%
Community
1
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

GradeStudentsShare
Grade 978933%
Grade 1056524%
Grade 1152522%
Grade 1249221%
Student demographics
44%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 42% · STATE 63% · US 70%
White
45319%
DISTRICT 18% · STATE 24% · US 43%
Hispanic
1,71272%
DISTRICT 74% · STATE 54% · US 30%
Black
1255%
DISTRICT 4% · STATE 13% · US 15%
Asian
201%
DISTRICT 1% · STATE 6% · US 6%
Two+
502%
DISTRICT 2% · STATE 3% · US 5%
Native American
50%
DISTRICT 0% · STATE 0% · US 1%
Pacific Islander
60%
DISTRICT 0% · STATE 0% · US 0%
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
Male
1,23852%
Female
1,13348%

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Test scores

STAAR 2025-26 . % Meets Grade Level or Above
Reading
46.0%
TX avg 54.5% . +26.0pp since 2020
Mathematics
19.0%
TX avg 45.3% . +13.0pp since 2020

What this means: On the STAAR, Texas's statewide test, about 46 of every 100 students at this school read at grade level and about 19 of 100 do math at grade level. Across all Texas schools, those numbers are about 55 and 45. Reading scores are up about 26 points since 2020, while math scores are up about 13 points.

Performance levels, 2025-26

SubjectMasters Grade LevelMeets Grade LevelApproaches Grade LevelDid Not Meet Grade Level
Reading8.0%38.0%21.0%33.0%
Mathematics4.0%15.0%40.0%41.0%
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 yearReadingMathematics
2025-2646.0%19.0%
2024-2539.0%18.0%
2023-2437.0%12.0%
2022-2316.0%10.0%
2021-2219.0%8.0%
2020-2120.0%6.0%
% 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 · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
38.8%
composite math + reading, all grades
Predicted
42.4%
based on TX schools with similar FRL share
Beats by
-3.6pp
below demographic expectation

What this means: About 39% of students here test proficient in math and reading, compared with the roughly 42% 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 San Marcos High School

San Marcos High School's state test result (38.8% proficient) is higher than 2 of the 5 schools below with a result.

SchoolStudentsLow-incomeProficient
San Marcos High School this school2,37173.3%38.8%
Caprock High School
AMARILLO
2,05874.5%49.5%
New Caney High School
NEW CANEY
2,22674.2%38.6%
Lockhart High School
LOCKHART
2,00671.5%37.6%
Porter High School
PORTER
2,09468.4%46.5%
Caney Creek High School
CONROE
2,78377.4%46.5%
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 San Marcos High School ranks

Among high schools
MeasureThis schoolIn TexasIn Hays County
State test proficiency
ranked highest first
38.8%#1,164 of 1,385#6 of 6
Math proficiency
ranked highest first
19.0%#1,330 of 1,425
▼ 35
#7 of 7
no change
Reading proficiency
ranked highest first
46.0%#1,091 of 1,425
▲ 89
#7 of 7
no change
3-year test score change
ranked biggest gain first
+19.5pp#430 of 1,184#4 of 7
Enrollment
ranked largest first
2,371#202 of 2,107#3 of 12
Students per teacher
ranked fewest first
14.8:1#701 of 1,344#2 of 7
Diversity index
ranked most diverse first
43.9%#833 of 1,346#5 of 7
Free and reduced lunch
ranked highest share first
73.3%#518 of 1,522#1 of 7
Enrollment change since 2017-18
ranked fastest growth first
+1.6%#621 of 672N/A
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 2024-25
Enrollment
2,371
-10 (0%) vs 2020
+129% since 1990-91, when it was 1,036
Student : Teacher
14.8:1
was 14.8:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-252,371159.914.8:173% (1,737)
2023-242,494168.214.8:175% (1,859)
2022-232,53616415.5:176% (1,930)
2020-212,38116114.8:171% (1,681)
2017-182,334159.214.7:158% (1,364)
2015-162,24615314.7:161% (1,369)
2010-112,13414514.7:156% (1,201)
2000-011,87411316.6:137% (696)
1990-911,0361069.8:1N/A
Source: NCES Common Core of Data. Rows are the federal collections on file for San Marcos High School.

Since 2017-18: students up 2% (2,334 to 2,371); teachers unchanged (159.2 to 159.9).

About San Marcos High School

San Marcos High School is classified as a high school. It is located in SAN MARCOS, Texas. The school runs grades 9 through 12 and enrolls 2,371 students. By comparison, high schools in Texas enroll about 796 students on average.

SAN MARCOS CISD counts 8,222 students in its 12 schools, and San Marcos High School is one of them.

Of every 100 students at San Marcos High School, about 72 are Hispanic. Beyond that, enrollment is 19% White, 5% Black, and 2% multiracial. The Hispanic share of the county population is lower, at 39%. The diversity index for San Marcos High School is 44%. For US public schools as a whole it is 70%.

The school has 159.9 full-time-equivalent teachers and a ratio of 14.8 students per teacher. It is about the same as the 15.1:1 average for high schools in Texas. The school reported 73% of students eligible for free or reduced-price lunch in 2024-25. That is higher than the 46% average for public schools in Hays County.

San Marcos High School earns a C- on the allk12 Grade, which blends test scores, results against poverty-based expectations, and the three-year trend. It scored higher than 18% of Texas public high schools.

San Marcos High School's average proficiency rate across its state test results of 38.8% is 3.6 points below the 42.4% the model predicts from its lunch-eligibility share.

In the surrounding county, Hays County, the median household earns about $89,097 a year, the share of adults with a bachelor's degree or higher is 43%, and about 6% of residents live below the federal poverty line. Counting San Marcos High School, Hays County has 63 public schools.

Straight-line distance to the nearest public school, Bowie Elementary School, is about 0.5 miles. Within five miles are at least 8 other public schools. The average proficiency across nearby scored schools is 33.9%; San Marcos High School's is 38.8%, ranking 2nd of 6.

The National Center for Education Statistics classifies the school's location as City: Small, meaning it is inside a principal city with a population under 100,000.

From 2020-21 to 2024-25, enrollment held near 2,371, starting from 2,381.

People who know San Marcos High School can post here about homework, tutoring, and testing dates. Teachers and staff are welcome to share updates too.

Hays County at a glance

View full county profile
Population
268,638
Census ACS
Median income
$89,097
Household, ACS
Bachelor's+
43%
Adults 25+
Poverty rate
6%
Below federal line
Schools in county
63
46,946 students

Quick facts

School name
San Marcos High School
District
SAN MARCOS CISD
Address
2601 RATTLER RD, SAN MARCOS, TX 78666
Phone
(512) 393-6805
County
Hays County
Level
High
Grade range
09–12
Total enrollment
2,371
Teachers (FTE)
160
Student–teacher ratio
14.8:1
Free and reduced lunch
1,737 (73%)
Locale
13-City: Small
NCES ID
483897004452
Charter school
No
Virtual school
No

Related schools

Other schools in SAN MARCOS CISD
Other schools in SAN MARCOS
Other San Marcos High schools

One other US public school is named San Marcos High. San Marcos High School is the 2nd largest of the 2.

Nearby schools

Frequently asked questions

About San Marcos High School
How many students attend San Marcos High School?
San Marcos High School enrolls approximately 2,371 students in grades 09-12.
Is San Marcos High School an elementary, middle, or high school?
San Marcos High School is a high school covering grades 09-12.
What is the student-teacher ratio at San Marcos High School?
The student-to-teacher ratio at San Marcos High School is approximately 14.8:1 (160 FTE teachers).
What is the racial breakdown of students at San Marcos High School?
At San Marcos High School, the student body is approximately 19% White, 72% Hispanic, 5% Black, 1% Asian, 2% Two or more.
Is San Marcos High School public or private?
San Marcos High School is a public K-12 school, overseen by SAN MARCOS CISD.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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