High · Regular · Grades 9 to 12
Calvin Nelms High School, Katy, TX
Charter schoolCalvin Nelms High School is a public high school in Katy, part of Calvin Nelms Charter Schools. It enrolled 183 students in 2024-25, with 18.3 students per full-time teacher.Listed in NCES data as "CALVIN NELMS H S".
Enrollment and teachers
- Students
- 183
- Teachers (FTE)
- 10.0
- Students per teacher
- 18.3
- Grades
- 9 to 12
This school's ratio is about the same as the district figure of 19.1. The Texas average across schools is 15.1. Ratios count all teachers, including specialists, so they are lower than typical class sizes.
This school18.3
District19.1
Texas15.1
United States15.3
School details
- Address
- 20625 Clay Rd, Katy, TX 77449
- Phone
- (281)398-8031
- District
- Calvin Nelms Charter Schools
- County
- Harris County
- Level
- High
- Type
- Regular
- Status
- Open
- Charter
- Yes
- Locale
- Suburb: Large
- NCES school ID
- 480012408248
Related schools
High schools elsewhere in Katy
- Seven Lakes High School Katy ISD
- Cinco Ranch High School Katy ISD
- Katy High School Katy ISD
- Paetow High School Katy ISD
- Taylor High School Katy ISD
- Jordan High School Katy ISD
- Cypress Lakes High School Cypress-Fairbanks ISD
- Tompkins High School Katy ISD
- Morton Ranch High School Katy ISD
- Harmony School of Innovation - Katy Harmony Public Schools - Houston West
- Aristoi Classical Upper School Aristoi Classical Academy
- Opport Awareness Ctr Katy ISD
We publish official enrollment and staffing data, not ratings or test scores.
Source: NCES Common Core of Data 2024-25 and F-33 finance 2020, via the Urban Institute Education Data Portal. Last reviewed October 2026. Blank values are not available, not applicable or suppressed in the source. See the methodology.