Poston Butte High School is a high school in San Tan Valley, Arizona in the Florence Unified School District. It opened July 20, 2009.
Serving 1,310 students in grades 7-12, Poston Butte High School ranks in the bottom 50% of all schools in Arizona for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 19% (which is lower than the Arizona state average of 34%). The percentage of students achieving proficiency in reading/language arts is 30% (which is lower than the Arizona state average of 40%).
The student-teacher ratio of 19:1 is higher than the Arizona state level of 17:1.
Minority enrollment is 60% of the student body (majority Hispanic), which is lower than the Arizona state average of 67% (majority Hispanic).
Quick Facts (2026)
- Grades: 7-12
- Enrollment: 1,310 students
- Student-Teacher Ratio: 19:1
- Minority Enrollment: 60%
- Graduation Rate: 94% (Top 20% in AZ)
- Overall Testing Rank: Bottom 50%
- Math Proficiency: 19% (Btm 50%)
- Reading Proficiency: 30% (Btm 50%)
- Science Proficiency: 10% (Btm 50%)
- Source: National Center for Education Statistics (NCES), AZ Dept. of Education
Top Rankings
Poston Butte High School ranks among the top 20% of public schools in Arizona for:
Category
Attribute
Graduation Rate
Diversity
School Overview
Poston Butte High School's student population of 1,310 students has declined by 10% over five school years.
The teacher population of 70 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 7-12
(No virtual instruction)
(No virtual instruction)
Total Students
1,310 students
Total Classroom Teachers
70 teachers
Year Founded
2009
Colors
Blue, Orange
School Calendar
Average Class Size
25 students
School Rankings
Poston Butte High School ranks within the bottom 50% of all 1,921 schools in Arizona (based off of combined math and reading proficiency testing data).
The diversity score of Poston Butte High School is 0.64, which is less than the diversity score at state average of 0.66. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#1268 out of 1921 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
19%
34%
Reading/Language Arts Test Scores (% Proficient)
30%
40%
Science Test Scores (% Proficient)
10%
24%
Student-Teacher Ratio
19:1
17:1
American Indian
2%
5%
Asian
1%
3%
Hispanic
44%
49%
Black
8%
6%
White
40%
33%
Hawaiian
1%
n/a
Two or more races
4%
4%
All Ethnic Groups
Graduation Rate
94%
77%
Eligible for Free Lunch
51%
41%
Eligible for Reduced Lunch
14%
10%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), AZ Dept. of Education
School Notes
- School Mascot: Tuff The Bronco
Frequently Asked Questions
What is Poston Butte High School's ranking?
Poston Butte High School is ranked #1268 out of 1,921 schools, which ranks it among the bottom 50% of public schools in Arizona.
What schools are Poston Butte High School often compared to?
Poston Butte High Schoolis often viewed alongside schools like Florence High School, San Tan Foothills High School, Combs High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
19% of students have achieved math proficiency (compared to the 34% AZ state average), while 30% of students have achieved reading proficiency (compared to the 40% AZ state average).
What is the graduation rate of Poston Butte High School?
The graduation rate of Poston Butte High School is 94%, which is higher than the Arizona state average of 77%.
How many students attend Poston Butte High School?
1,310 students attend Poston Butte High School.
What is the racial composition of the student body?
44% of Poston Butte High School students are Hispanic, 40% of students are White, 8% of students are Black, 4% of students are Two or more races, 2% of students are American Indian, 1% of students are Asian, and 1% of students are Hawaiian.
What is the student-teacher ratio of Poston Butte High School?
Poston Butte High School has a student ration of 19:1, which is higher than the Arizona state average of 17:1.
What grades does Poston Butte High School offer ?
Poston Butte High School offers enrollment in grades 7-12 (No virtual instruction).
What school district is Poston Butte High School part of?
Poston Butte High School is part of Florence Unified School District (4437).
School Reviews
Review Poston Butte High School. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
When “Free Public School” Still Isn’t Free
Discover the hidden costs of public school in 2026, from supplies and fees to transportation, technology, and extracurricular expenses.
What a District Budget Cut Means for Your Child's School Experience
Learn how district budget cuts can affect class sizes, programs, staffing, transportation, and your child's daily school experience in 2026.
School Closure Risk: What Parents Should Check Before Moving
Learn how parents can assess school closure risk before buying or renting in a district, using enrollment, funding, and boundary data.
