For the 2025-26 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 (2025-26)
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 51³Ô¹ÏÍøºÚÁÏ (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).
Which public charter schools in Katy are often viewed compared to one another?
Popular comparisons of public charter schools in Katy include: Iltexas Katy Elementary School vs. Harmony Science Academy-katy, Aristoi Classical Academy-cypress vs. Harmony Science Academy-katy, Harmony Science Academy-katy vs. Aristoi Classical Academy-cypress
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