William J. Brennan High School is the tenth public high school in the Northside Independent School District of San Antonio, Texas, United States. It is a four-year high school that opened in 2010 and graduated its first senior class in June 2012.
Serving 2,965 students in grades 9-12, Brennan High School ranks in the bottom 50% of all schools in Texas for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 24% (which is lower than the Texas state average of 44%). The percentage of students achieving proficiency in reading/language arts is 58% (which is higher than the Texas state average of 51%).
The student-teacher ratio of 17:1 is higher than the Texas state level of 14:1.
Minority enrollment is 85% of the student body (majority Hispanic), which is higher than the Texas state average of 76% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 2,965 students
- Student-Teacher Ratio: 17:1
- Minority Enrollment: 85%
- Graduation Rate: ≥99% (Top 1% in TX)
- Overall Testing Rank: Bottom 50%
- Math Proficiency: 24% (Btm 50%)
- Reading Proficiency: 58% (Top 30%)
- Science Proficiency: 63% (Top 20%)
- Source: National Center for Education Statistics (NCES), TX Dept. of Education
Top Rankings
Brennan High School ranks among the top 20% of public schools in Texas for:
Category
Attribute
Science Proficiency
Graduation Rate
School Overview
Brennan High School's student population of 2,965 students has grown by 7% over five school years.
The teacher population of 174 teachers has grown by 11% over five school years.
Grades Offered
Grades 9-12
Total Students
2,965 students
Total Classroom Teachers
174 teachers
Year Founded
2010
School Rankings
Brennan High School ranks within the bottom 50% of all 8,096 schools in Texas (based off of combined math and reading proficiency testing data).
The diversity score of Brennan High School is 0.56, which is less than the diversity score at state average of 0.64. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#4740 out of 8096 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
24%
44%
Reading/Language Arts Test Scores (% Proficient)
58%
51%
Science Test Scores (% Proficient)
63%
46%
Student-Teacher Ratio
17:1
14:1
American Indian
n/a
n/a
Asian
3%
6%
Hispanic
63%
54%
Black
14%
13%
White
15%
24%
Hawaiian
n/a
n/a
Two or more races
5%
3%
All Ethnic Groups
Graduation Rate
≥99%
90%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
28%
56%
Eligible for Reduced Lunch
6%
4%
School Statewide Testing
School District Name
Northside Independent School District
Source: National Center for Education Statistics (NCES), TX Dept. of Education
School Notes
- School Mascot: Bears
Frequently Asked Questions
What is Brennan High School's ranking?
Brennan High School is ranked #4740 out of 8,096 schools, which ranks it among the bottom 50% of public schools in Texas.
What schools are Brennan High School often compared to?
Brennan High Schoolis often viewed alongside schools like Brandeis High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
24% of students have achieved math proficiency (compared to the 44% TX state average), while 58% of students have achieved reading proficiency (compared to the 51% TX state average).
What is the graduation rate of Brennan High School?
The graduation rate of Brennan High School is 99%, which is higher than the Texas state average of 90%.
How many students attend Brennan High School?
2,965 students attend Brennan High School.
What is the racial composition of the student body?
63% of Brennan High School students are Hispanic, 15% of students are White, 14% of students are Black, 5% of students are Two or more races, and 3% of students are Asian.
What is the student-teacher ratio of Brennan High School?
Brennan High School has a student ration of 17:1, which is higher than the Texas state average of 14:1.
What grades does Brennan High School offer ?
Brennan High School offers enrollment in grades 9-12
What school district is Brennan High School part of?
Brennan High School is part of Northside Independent School District.
In what neighborhood is Brennan High School located?
Brennan High School is located in the Far West Side neighborhood of San Antonio, TX. There are 69 other public schools located in Far West Side.
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