Castle Rock Elementary
PublicElementaryGrades K–5
2975 Castle Rock Rd., Diamond Bar, CA 91765 · (909) 598-5006 · Part of Walnut Valley Unified School District
Diamond Bar’s School Grade B+ better than 72% of California school districts
Students
684
Students per teacher
26:1
Free or reduced lunch
27%
Setting
Suburb
Grades
K–5
What stands out about Castle Rock Elementary
- Larger classes: 26 students per teacher
- No state test results published for this school
- Next stop for Diamond Bar kids: 3 middle schools
On the path
Where Diamond Bar kids come from and go next. The whole path →
K–5Castle Rock ElementaryYou are here
6–83 middle schoolsDepends on your address
Location
Directions ↗2975 Castle Rock Rd., Diamond Bar
Students
Enrollment by grade
Kindergarten131
Grade 176
Grade 2102
Grade 3101
Grade 4137
Grade 5137
Enrollment over time
683’20
663’21
646’22
691’23
684’24
About steady since 2020–21.
Who goes here
Asian 70%Hispanic 19%Two or more races 5%White 3%Black 1%Native Hawaiian/Pacific Islander <1%American Indian/Alaska Native <1%
As reported to NCES, share of students with a reported race or ethnicity.
Parents talk
Questions and answers about Castle Rock Elementary from Diamond Bar families.
Other schools in Walnut Valley Unified School District
School facts: U.S. Department of Education (NCES), 2024–2025 school year. Map: © OpenStreetMap contributors.