For the 2026 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, Calvin Nelms Middle School and Harmony Science Academy-katy. 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 53% (versus the Texas public charter school average of 38%), and reading proficiency score of 64% (versus the 49% statewide average). Charter schools in Katy have an average ranking of 10/10, which is in the top 10% 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 (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Calvin Nelms High School
Charter School
(Math: 70-79% | Reading: 70-79%)
Rank:
Rank:
10/
Top 10%10
20625 Clay Rd
Katy, TX 77449
(281) 398-8031
Katy, TX 77449
(281) 398-8031
Gr: 9-12 | 168 students Student-teacher ratio: 17:1 Minority enrollment: 82%
Rank: #22.
Calvin Nelms Middle School
Charter School
(Math: 70-74% | Reading: 70-74%)
Rank:
Rank:
10/
Top 10%10
20625 Clay Rd
Katy, TX 77449
(281) 398-8031
Katy, TX 77449
(281) 398-8031
Gr: 6-8 | 156 students Student-teacher ratio: 20:1 Minority enrollment: 91%
Rank: #33.
Harmony Science Academy-katy
Charter School
(Math: 70% | Reading: 74%)
Rank:
Rank:
10/
Top 10%10
22400 Grand Corner Dr
Katy, TX 77494
(832) 437-3926
Katy, TX 77494
(832) 437-3926
Gr: PK-7 | 1,331 student Student-teacher ratio: 17:1 Minority enrollment: 83%
Rank: #44.
Aristoi Classical Upper School
Charter School
(Math: 54% | Reading: 79%)
Rank:
Rank:
9/
Top 20%10
5610 Morton Rd
Katy, TX 77493
(281) 391-5003
Katy, TX 77493
(281) 391-5003
Gr: 5-12 | 665 students Student-teacher ratio: 14:1 Minority enrollment: 53%
Rank: #55.
Aristoi Classical Academy
Charter School
(Math: 55-59% | Reading: 65-69%)
Rank:
Rank:
9/
Top 20%10
5618 11th St
Katy, TX 77493
(281) 391-5003
Katy, TX 77493
(281) 391-5003
Gr: K-4 | 437 students Student-teacher ratio: 17:1 Minority enrollment: 51%
Rank: #66.
Aristoi Classical Academy-cypress
Charter School
(Math: 35-39% | Reading: 55-59%)
Rank:
Rank:
6/
Top 50%10
12332 Perry Rd
Katy, TX 77493
(281) 391-5003
Katy, TX 77493
(281) 391-5003
Gr: K-8 | 433 students Student-teacher ratio: 15:1 Minority enrollment: 55%
Rank: #77.
Iltexas Katy Middle School
Charter School
(Math: 42% | Reading: 50%)
Rank:
Rank:
6/
Top 50%10
24406 Franz Rd
Katy, TX 77493
(281) 394-9417
Katy, TX 77493
(281) 394-9417
Gr: 6-8 | 435 students Student-teacher ratio: 17:1 Minority enrollment: 95%
Rank: #88.
Iltexas Katy Elementary School
Charter School
(Math: 33% | Reading: 57%)
Rank:
Rank:
6/
Top 50%10
24406 Franz Rd
Katy, TX 77493
(281) 394-9417
Katy, TX 77493
(281) 394-9417
Gr: K-5 | 939 students Student-teacher ratio: 17:1 Minority enrollment: 93%
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
Gr: 7-11 | 35 students Student-teacher ratio: 9:1 Minority enrollment: 89%
Katy, Texas Public Schools (Closed)
School
Location
Quick Facts
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
Gr: 2
Calvin Nelms - Northwest (Closed 2013)
Alternative School
1346 Wilkins St
Katy, TX 77449
(979) 826-8302
Katy, TX 77449
(979) 826-8302
Gr: K-12
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
Gr: 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
Gr: 9-12 | 173 students Student-teacher ratio: 9:1 Minority enrollment: 69%
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
Gr: 6-12 | 67 students Student-teacher ratio: 11:1 Minority enrollment: 66%
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, Calvin Nelms Middle School and Harmony Science Academy-katy. 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).