Serving 803 students in grades 6-8, Cardiff J High School ranks in the bottom 50% of all schools in Texas for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 43% (which is lower than the Texas state average of 44%). The percentage of students achieving proficiency in reading/language arts is 42% (which is lower than the Texas state average of 51%).
The student-teacher ratio of 11:1 is lower than the Texas state level of 14:1.
Minority enrollment is 89% of the student body (majority Hispanic), which is higher than the Texas state average of 76% (majority Hispanic).
Quick Facts (2026-27)
- Grades: 6-8
- Enrollment: 803 students
- Student-Teacher Ratio: 11:1
- Minority Enrollment: 89%
- Overall Testing Rank: Bottom 50% in TX
- Math Proficiency: 43% (Top 50%)
- Reading Proficiency: 42% (Btm 50%)
- Science Proficiency: 40% (Btm 50%)
- Attendance Zone: Cardiff J H serves the eastern part of Katy, TX, covering an area of approximately 14.8 square miles. The typical drive to the school takes about 5-10 minutes, with an average distance of 3 miles from the school to the edge of the attendance zone, which extends up to 7.3 miles at its furthest point.
- Source: National Center for Education Statistics (NCES), TX Dept. of Education
School Overview
Cardiff J High School's student population of 803 students has declined by 13% over five school years.
The teacher population of 71 teachers has declined by 8% over five school years.
Grades Offered
Grades 6-8
Total Students
803 students
Total Classroom Teachers
71 teachers
School Rankings
Cardiff J 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 Cardiff J High School is 0.48, 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
#4703 out of 8096 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
43%
44%
Reading/Language Arts Test Scores (% Proficient)
42%
51%
Science Test Scores (% Proficient)
40%
46%
Student-Teacher Ratio
11:1
14:1
American Indian
n/a
n/a
Asian
2%
6%
Hispanic
70%
54%
Black
15%
13%
White
11%
24%
Hawaiian
n/a
n/a
Two or more races
2%
3%
All Ethnic Groups
Chronically Absent Students
(22-23)20.1%
23%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
81%
56%
Eligible for Reduced Lunch
1%
4%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), TX Dept. of Education
Frequently Asked Questions
What is Cardiff J High School's ranking?
Cardiff J High School is ranked #4703 out of 8,096 schools, which ranks it among the bottom 50% of public schools in Texas.
What schools are Cardiff J High School often compared to?
Cardiff J High Schoolis often viewed alongside schools like Mayde Creek J High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
43% of students have achieved math proficiency (compared to the 44% TX state average), while 42% of students have achieved reading proficiency (compared to the 51% TX state average).
How many students attend Cardiff J High School?
803 students attend Cardiff J High School.
What is the racial composition of the student body?
70% of Cardiff J High School students are Hispanic, 15% of students are Black, 11% of students are White, 2% of students are Asian, and 2% of students are Two or more races.
What is the student-teacher ratio of Cardiff J High School?
Cardiff J High School has a student ration of 11:1, which is lower than the Texas state average of 14:1.
What grades does Cardiff J High School offer ?
Cardiff J High School offers enrollment in grades 6-8
What school district is Cardiff J High School part of?
Cardiff J High School is part of Katy Independent School District.
School Reviews
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