For the 2025 school year, there are 9 public charter schools serving 4,599 students in Katy, TX. The top ranked public charter schools in Katy, TX are Calvin Nelms High School, Harmony Science Academy-katy and Aristoi Classical Upper School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Katy, TX public charter schools have an average math proficiency score of 45% (versus the Texas public charter school average of 35%), and reading proficiency score of 64% (versus the 49% statewide average). Charter schools in Katy have an average ranking of 9/10, which is in the top 20% of Texas public charter schools.
Minority enrollment is 76% of the student body (majority Hispanic), which is less than the Texas public charter school average of 88% (majority Hispanic).
Best Public Charter Schools in Katy, TX (2025)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Grades
Students
Rank: #11.
Calvin Nelms High School
Charter School
(Math: 60-69% | Reading: 70-79%)
Rank:
Rank:
10/
Top 10%10
20625 Clay Rd
Katy, TX 77449
(281) 398-8031
Katy, TX 77449
(281) 398-8031
Grades: 9-12
| 168 students
Rank: #22.
Harmony Science Academy-katy
Charter School
(Math: 64% | Reading: 74%)
Rank:
Rank:
10/
Top 10%10
22400 Grand Corner Dr
Katy, TX 77494
(832) 437-3926
Katy, TX 77494
(832) 437-3926
Grades: PK-7
| 1,331 students
Rank: #33.
Aristoi Classical Upper School
Charter School
(Math: 53% | Reading: 79%)
Rank:
Rank:
9/
Top 20%10
5610 Morton Rd
Katy, TX 77493
(281) 391-5003
Katy, TX 77493
(281) 391-5003
Grades: 5-12
| 665 students
Rank: #44.
Calvin Nelms Middle School
Charter School
(Math: 50-54% | Reading: 70-74%)
Rank:
Rank:
9/
Top 20%10
20625 Clay Rd
Katy, TX 77449
(281) 398-8031
Katy, TX 77449
(281) 398-8031
Grades: 6-8
| 156 students
Rank: #55.
Aristoi Classical Academy
Charter School
(Math: 50-54% | Reading: 65-69%)
Rank:
Rank:
9/
Top 20%10
5618 11th St
Katy, TX 77493
(281) 391-5003
Katy, TX 77493
(281) 391-5003
Grades: K-4
| 437 students
Rank: #66.
Aristoi Classical Academy-cypress
Charter School
(Math: 30-34% | Reading: 55-59%)
Rank:
Rank:
6/
Top 50%10
12332 Perry Rd
Katy, TX 77493
(281) 391-5003
Katy, TX 77493
(281) 391-5003
Grades: K-8
| 433 students
Rank: #77.
Iltexas Katy Elementary School
Charter School
(Math: 29% | Reading: 57%)
Rank:
Rank:
5/
Bottom 50%10
24406 Franz Rd
Katy, TX 77493
(281) 394-9417
Katy, TX 77493
(281) 394-9417
Grades: K-5
| 939 students
Rank: #88.
Iltexas Katy Middle School
Charter School
(Math: 36% | Reading: 50%)
Rank:
Rank:
5/
Bottom 50%10
24406 Franz Rd
Katy, TX 77493
(281) 394-9417
Katy, TX 77493
(281) 394-9417
Grades: 6-8
| 435 students
Rank: #99.
Leadership Academy
Alternative School
Charter School
Charter School
(Math: ≤10% | Reading: ≤10%)
Rank:
Rank:
1/
Bottom 50%10
9120 Katy Hockley Rd
Katy, TX 77493
(713) 222-4629
Katy, TX 77493
(713) 222-4629
Grades: 7-11
| 35 students
Katy, Texas Public Schools (Closed)
School
Location
Grades
Students
Calvin Nelms - North East Campus (Closed 2010)
Alternative School
18425 Timber Forest Dr
Katy, TX 77449
(281) 398-8031
Katy, TX 77449
(281) 398-8031
Grades: 2
| n/a students
Calvin Nelms - Northwest (Closed 2013)
Alternative School
1346 Wilkins St
Katy, TX 77449
(979) 826-8302
Katy, TX 77449
(979) 826-8302
Grades: K-12
| n/a students
Harris Co Sch For Accelerated Lrn (Closed 2018)
Alternative School
1732 Katyland Dr
Katy, TX 77492
(281) 237-6350
Katy, TX 77492
(281) 237-6350
Grades: 10
| 2 students
Raines High School (Closed 2020)
Alternative School
1732 Katyland Dr
Katy, TX 77493
(281) 237-1500
Katy, TX 77493
(281) 237-1500
Grades: 9-12
| 173 students
Trinity Charter School (Closed 2021)
Alternative School
Charter School
Charter School
5638 Kingsland Blvd
Katy, TX 77494
(281) 392-7505
Katy, TX 77494
(281) 392-7505
Grades: 6-12
| 67 students
Frequently Asked Questions
What are the top ranked public charter schools in Katy, TX?
The top ranked public charter schools in Katy, TX include Calvin Nelms High School, Harmony Science Academy-katy and Aristoi Classical Upper School. Katy has one of the highest concentrations of top ranked public schools in Texas.
How many public charter schools are located in Katy?
9 public charter schools are located in Katy.
What is the racial composition of students in Katy?
Katy public charter schools minority enrollment is 76% of the student body (majority Hispanic), which is less than the Texas public charter schools average of 88% (majority Hispanic).
Which public charter schools in Katy are often viewed compared to one another?
Popular comparisons of public charter schools in Katy include: Aristoi Classical Academy-cypress vs. Harmony Science Academy-katy, Iltexas Katy Elementary School vs. Harmony Science Academy-katy, Harmony Science Academy-katy vs. Aristoi Classical Academy-cypress
Recent Articles
Understanding the Consequences of Banning Books in K-12 Education
Explore the historical and contemporary issues surrounding the banning of books in public K-12 schools. Discover how parental guidance can serve as a more effective educational strategy, fostering critical thinking and empathy while respecting the freedom to read.
Washington DC's Gains Under Michelle Rhee: A Result of Cheating?
Michelle Rhee is in the hot seat once again, as concerns about cheating abound during her time as chancellor of Washington DC schools. Learn about the high incidences of erasures and why the accusations are flying.
Foreign Language Study Abroad
We've put together this resource guide to help students, adults and professionals get the information they require to choose a good destination to study language abroad.