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Castle Rock Elementary School

2975 Castle Rock Rd.
Diamond Bar, CA 91765

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10/

Top 10%

Tel: (909) 598-5006

www.castlerockknights.org

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Serving 684 students in grades Kindergarten-5, Castle Rock Elementary School ranks in the top 10% of all schools in California for overall test scores (math proficiency is top 10%, and reading proficiency is top 10%).

The percentage of students achieving is 69% (which is higher than the California state average of 34%). The percentage of students achieving is 71% (which is higher than the California state average of 47%).

The student-teacher ratio of 26:1 is higher than the California state level of 21:1.

Minority enrollment is 97% of the student body (majority Asian), which is higher than the California state average of 80% (majority Hispanic and Asian).

Quick Facts (26-27)

Grades: Kindergarten-5
Enrollment: 684 students
Student-Teacher Ratio: 26:1
Minority Enrollment: 97%
: Top 10% in CA
: 69% (Top 10%)
: 71% (Top 20%)
: 60-64% (Top 10%)
: Castle Rock Elementary serves the southern part of Diamond Bar, CA, covering an area of approximately 8.3 square miles. Most families in the attendance zone can expect a typical drive of 5 to 10 minutes to reach the school, with an average distance of 1.6 miles to the zone's edge and a maximum distance of 3.8 miles.
Source: National Center for Education Statistics (NCES), CA Dept. of Education

Top Rankings

Castle Rock Elementary School ranks among the top 20% of public schools in California for:

School Overview

Castle Rock Elementary School's student population of 684 students has stayed relatively flat over five school years.

The teacher population of 26 teachers has stayed relatively flat over five school years.

Grades Offered

Grades Kindergarten-5

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Distribution of Students By Grade Trends
Grade	Castle Rock Elementary School
Kind	131
1	76
2	102
3	101
4	137
5	137

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Total Students

684 students

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Showing 2015–2025. Full 39-year historical data available below ↓

Total Students Trends (1987-2025)
Year	Castle Rock Elementary School
2025	684
2024	691
2023	646
2022	663
2021	683
2020	662
2019	667
2018	689
2017	676
2015	605
2014	579
2013	576
2012	533
2011	512
2010	503
2009	526
2008	543
2007	567
2006	582
2005	601
2004	600
2003	605
2002	620
2001	653
2000	680
1999	712
1998	677
1997	681
1996	673
1995	675
1994	703
1993	708
1992	773
1991	737
1990	708
1989	796
1988	699
1987	880

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Total Classroom Teachers

26 teachers

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Showing 2014–2025. Full 39-year historical data available below ↓

Total Classroom Teachers Trends (1987-2025)
Year	Castle Rock Elementary School
2025	26
2024	26
2023	26
2022	29
2021	27
2019	26
2018	27
2017	26
2015	23
2014	23
2013	21
2012	21
2010	22
2009	27
2008	31
2007	29
2006	30
2005	29
2004	29
2003	29
2002	31
2001	31
2000	31
1999	33
1998	33
1997	32
1996	23
1995	25
1994	27
1993	24
1992	26
1991	26
1990	27
1989	31
1988	25
1987	31

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Year Founded

2006

School Calendar

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School Rankings

Castle Rock Elementary School ranks within the top 10% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).

The of Castle Rock Elementary School is 0.47, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.

This School

State Level (CA)

#911 out of 9523 schools
(Top 10%)

View Data

Showing 2011–2023. Full 14-year historical data available below ↓

Overall School Rank Trends (2010-2023)
Year	Castle Rock Elementary School
2023	#911
2022	#877
2019	#1037
2018	#1016
2017	#952
2016	#518
2015	#769
2013	#269
2012	#669
2011	#439
2010	#513

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69%

34%

View Data

Showing 2011–2023. Full 14-year historical data available below ↓

Math Proficiency Comparison (2010-2023)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2023	69%	34%	71%
2022	71%	33%	70%
2019	73%	40%	75%
2018	71%	39%	74%
2017	73%	38%	73%
2016	80%	37%	71%
2015	71%	34%	68%
2013	92%	59%	84%
2012	87%	59%	84%
2011	88%	58%	82%
2010	86%	56%	82%

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71%

47%

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Reading and Language Arts Proficiency Comparison (2010-2022)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2022	71%	47%	76%
2019	70%	51%	77%
2018	70%	50%	74%
2017	68%	48%	75%
2016	75%	48%	74%
2015	67%	44%	72%
2013	85%	57%	80%
2012	81%	58%	82%
2011	84%	56%	82%
2010	82%	54%	80%

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60-64%

29%

Student-Teacher Ratio

26:1

21:1

View Data

Showing 2014–2025. Full 39-year historical data available below ↓

Student-Teacher Ratio Comparison (1987-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	26:1	21:1
2024	27:1	22:1
2023	25:1	22:1	25:1
2022	23:1	22:1	24:1
2021	25:1	22:1	24:1
2019	26:1	23:1	25:1
2018	26:1	23:1	25:1
2017	26:1	23:1	25:1
2015	26:1	24:1	26:1
2014	25:1	24:1	26:1
2013	27:1	24:1	26:1
2012	25:1	23:1	26:1
2010	23:1	21:1	24:1
2009	19:1	20:1	23:1
2008	18:1	18:1	21:1
2007	20:1	21:1	24:1
2006	19:1	20:1	24:1
2005	21:1	21:1	24:1
2004	21:1	21:1	23:1
2003	21:1	20:1	23:1
2002	20:1	20:1	23:1
2001	21:1	20:1	23:1
2000	22:1	21:1	24:1
1999	22:1	21:1	24:1
1998	21:1	21:1	24:1
1997	21:1	23:1	25:1
1996	29:1	25:1	27:1
1995	27:1	25:1	27:1
1994	26:1	25:1	28:1
1993	30:1	25:1	28:1
1992	30:1	24:1	28:1
1991	28:1	24:1	27:1
1990	26:1	24:1	26:1
1989	26:1	24:1	26:1
1988	28:1	24:1	27:1
1987	28:1	24:1	27:1

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Asian

70%

12%

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Showing 2015–2025. Full 38-year historical data available below ↓

Asian Student Percentage Comparison (1988-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	70%	12%
2024	70%	12%
2023	71%	12%	68%
2022	70%	12%	67%
2021	71%	12%	66%
2020	71%	12%	65%
2019	69%	12%	65%
2018	68%	12%	63%
2017	65%	11%	63%
2015	64%	11%	64%
2014	65%	11%	62%
2013	64%	11%	63%
2012	64%	11%	63%
2011	61%	11%	63%
2010	63%	11%	63%
2009	62%	11%	63%
2008	64%	12%	65%
2007	66%	12%	64%
2006	62%	12%	62%
2005	63%	12%	60%
2004	61%	12%	58%
2003	57%	12%	57%
2002	58%	11%	56%
2001	59%	11%	54%
2000	60%	11%	52%
1999	60%	11%	50%
1998	56%	11%	49%
1997	51%	11%	47%
1996	49%	11%	45%
1995	46%	11%	44%
1994	42%	11%	42%
1993	42%	11%	40%
1992	40%	11%	37%
1991	40%	11%	33%
1990	38%	10%	31%
1989	33%	10%	27%
1988	27%	10%	21%

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Hispanic

19%

56%

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Showing 2015–2025. Full 38-year historical data available below ↓

Hispanic Student Percentage Comparison (1988-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	19%	56%
2024	18%	56%
2023	17%	55%	22%
2022	18%	56%	23%
2021	18%	56%	23%
2020	19%	55%	23%
2019	19%	55%	23%
2018	19%	54%	24%
2017	20%	54%	24%
2015	19%	54%	23%
2014	19%	53%	23%
2013	19%	53%	23%
2012	17%	52%	22%
2011	19%	51%	22%
2010	18%	50%	21%
2009	17%	49%	20%
2008	18%	50%	19%
2007	16%	49%	19%
2006	18%	48%	19%
2005	17%	47%	19%
2004	18%	46%	19%
2003	19%	45%	18%
2002	18%	44%	19%
2001	17%	43%	19%
2000	16%	42%	18%
1999	15%	41%	18%
1998	18%	40%	18%
1997	17%	40%	18%
1996	16%	39%	18%
1995	16%	38%	18%
1994	13%	37%	18%
1993	14%	36%	18%
1992	14%	35%	18%
1991	13%	34%	19%
1990	14%	33%	18%
1989	15%	31%	19%
1988	15%	30%	19%

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Black

View Data

Showing 2015–2025. Full 38-year historical data available below ↓

Black Student Percentage Comparison (1988-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	2%	5%
2024	1%	5%
2023	1%	5%	1%
2022	1%	5%	1%
2021	1%	5%	1%
2020	1%	5%	2%
2019	1%	5%	2%
2018	1%	5%	2%
2017	2%	6%	2%
2015	3%	6%	2%
2014	3%	6%	3%
2013	3%	6%	3%
2012	4%	6%	3%
2011	4%	7%	3%
2010	4%	7%	3%
2009	3%	7%	3%
2008	4%	8%	3%
2007	5%	8%	3%
2006	5%	8%	4%
2005	4%	8%	4%
2004	4%	8%	4%
2003	3%	8%	5%
2002	4%	9%	5%
2001	4%	9%	5%
2000	4%	9%	5%
1999	4%	9%	6%
1998	4%	9%	6%
1997	6%	9%	6%
1996	5%	9%	6%
1995	3%	9%	6%
1994	6%	9%	6%
1993	4%	9%	5%
1992	5%	9%	5%
1991	4%	8%	5%
1990	4%	9%	5%
1989	4%	9%	5%
1988	4%	9%	5%

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White

20%

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Showing 2015–2025. Full 38-year historical data available below ↓

White Student Percentage Comparison (1988-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	3%	20%
2024	4%	20%
2023	4%	21%	5%
2022	5%	21%	5%
2021	4%	22%	6%
2020	4%	22%	6%
2019	6%	23%	6%
2018	6%	23%	8%
2017	7%	24%	8%
2015	8%	25%	9%
2014	8%	25%	9%
2013	10%	25%	10%
2012	13%	26%	11%
2011	14%	27%	11%
2010	14%	27%	12%
2009	14%	28%	13%
2008	14%	29%	13%
2007	13%	30%	14%
2006	15%	31%	15%
2005	16%	32%	17%
2004	17%	33%	19%
2003	20%	34%	19%
2002	20%	35%	20%
2001	20%	36%	22%
2000	20%	37%	25%
1999	21%	38%	26%
1998	22%	39%	27%
1997	26%	39%	29%
1996	30%	40%	31%
1995	35%	41%	32%
1994	39%	42%	34%
1993	39%	43%	37%
1992	41%	44%	40%
1991	43%	46%	43%
1990	44%	47%	46%
1989	48%	49%	49%
1988	54%	50%	55%

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Hawaiian

n/a

Two or more races

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Showing 2015–2025. Full 17-year historical data available below ↓

Two or More Races Student Percentage Comparison (2009-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	5%	6%
2024	6%	6%
2023	6%	6%	4%
2022	6%	5%	4%
2021	6%	5%	4%
2020	5%	5%	4%
2019	5%	4%	4%
2018	6%	4%	3%
2017	6%	4%	3%
2015	6%	3%	2%
2014	5%	3%	2%
2013	4%	3%	1%
2012	2%	3%	1%
2011	1%	3%	1%
2010	1%	3%	1%
2009	4%	3%

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All Ethnic Groups

97%

80%

0.47

0.63

View Data

Showing 2015–2025. Full 38-year historical data available below ↓

Diversity Score Comparison (1988-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	0.47	0.63
2024	0.48	0.63
2023	0.47	0.64	0.50
2022	0.48	0.63	0.51
2021	0.46	0.62	0.51
2020	0.46	0.64	0.53
2019	0.49	0.63	0.53
2018	0.50	0.64	0.54
2017	0.53	0.64	0.54
2015	0.55	0.64	0.54
2014	0.54	0.65	0.56
2013	0.55	0.65	0.55
2012	0.55	0.65	0.55
2011	0.58	0.66	0.55
2010	0.55	0.67	0.55
2009	0.57	0.67	0.55
2008	0.54	0.65	0.54
2007	0.52	0.66	0.55
2006	0.56	0.66	0.56
2005	0.55	0.66	0.58
2004	0.57	0.67	0.59
2003	0.60	0.67	0.61
2002	0.60	0.67	0.61
2001	0.59	0.67	0.63
2000	0.58	0.67	0.64
1999	0.58	0.67	0.65
1998	0.61	0.67	0.66
1997	0.65	0.67	0.67
1996	0.65	0.67	0.67
1995	0.65	0.67	0.67
1994	0.66	0.67	0.68
1993	0.66	0.67	0.68
1992	0.66	0.67	0.68
1991	0.64	0.66	0.68
1990	0.65	0.66	0.67
1989	0.64	0.65	0.65
1988	0.62	0.65	0.62

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(22-23)

13%

27.7%

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Chronic Absenteeism Rate (2021-2023)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2023	13%	27.7%	9.2%
2022	11.1%	33%	9.4%
2021	1.6%	15.4%	1.2%

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Eligible for

26%

54%

View Data

Showing 2015–2025. Full 34-year historical data available below ↓

Free Lunch Eligibility Comparison (1992-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	26%	54%
2024	27%	54%
2023	25%	51%	24%
2022	23%	51%	24%
2021	19%	53%	22%
2020	16%	52%	20%
2019	21%	52%	20%
2018	19%	53%	9%
2017	8%	49%	9%
2015	4%	50%	6%
2014	3%	49%	9%
2013	6%	48%	10%
2011	4%	46%	8%
2010	6%	46%	8%
2009	6%	43%	6%
2008	4%	41%	4%
2007	8%	40%	6%
2006	9%	40%	7%
2005	9%	40%	6%
2004	9%	40%	6%
2003	7%	39%	6%
2002	4%	39%	4%
2001	5%	39%	4%
2000	2%	40%	5%
1999	2%	40%	5%
1998	7%	47%	6%
1997	6%	47%	7%
1996	3%	46%	6%
1995	5%	45%	5%
1994	2%	43%	3%
1993	1%	41%	2%
1992	2%	38%	1%

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Eligible for

View Data

Showing 2013–2025. Full 27-year historical data available below ↓

Reduced-Price Lunch Eligibility Comparison (1999-2025)
Year	Castle Rock Elementary School	California	Walnut Valley Unified School District
2025	1%	8%
2024	1%	8%
2023	2%	8%	2%
2020	1%	7%	2%
2019	1%	7%	2%
2018	2%	7%	3%
2017	2%	9%	3%
2015	4%	9%	6%
2014	2%	9%	5%
2013	5%	7%	5%
2011	5%	8%	5%
2010	4%	9%	5%
2009	4%	10%	5%
2008	3%	10%	3%
2007	5%	10%	5%
2006	6%	9%	4%
2005	6%	9%	4%
2004	6%	9%	4%
2003	4%	9%	3%
2002	5%	8%	3%
2001	3%	8%	2%
2000	2%	7%	2%
1999	3%	7%	2%

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School Statewide Testing

View Education Department Test Scores

School District Name

Walnut Valley Unified School District

Source: National Center for Education Statistics (NCES), CA Dept. of Education

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Frequently Asked Questions

What is Castle Rock Elementary School's ranking?

Castle Rock Elementary School is ranked #911 out of 9,523 schools, which ranks it among the top 10% of public schools in California.

What schools are Castle Rock Elementary School often compared to?

Castle Rock Elementary Schoolis often viewed alongside schools like Evergreen Elementary School, Maple Hill Elementary School by visitors of our site.

What percent of students have achieved state testing proficiency in math and reading?

69% of students have achieved math proficiency (compared to the 34% CA state average), while 71% of students have achieved reading proficiency (compared to the 47% CA state average).

How many students attend Castle Rock Elementary School?

684 students attend Castle Rock Elementary School.

What is the racial composition of the student body?

70% of Castle Rock Elementary School students are Asian, 19% of students are Hispanic, 5% of students are Two or more races, 3% of students are White, 2% of students are Black, and 1% of students are Hawaiian.

What is the student-teacher ratio of Castle Rock Elementary School?

Castle Rock Elementary School has a student ration of 26:1, which is higher than the California state average of 21:1.

What grades does Castle Rock Elementary School offer ?

Castle Rock Elementary School offers enrollment in grades Kindergarten-5

What school district is Castle Rock Elementary School part of?

Castle Rock Elementary School is part of Walnut Valley Unified School District.

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Quick Facts (26-27)

Grades: Kindergarten-5
Enrollment: 684 students
Student-Teacher Ratio: 26:1
Minority Enrollment: 97%
: Top 10%
: 69% (Top 10%)
: 71% (Top 20%)
: 60-64% (Top 10%)
: Castle Rock Elementary serves the southern part of Diamond Bar, CA, covering an area of approximately 8.3 square miles. Most families in the attendance zone can expect a typical drive of 5 to 10 minutes to reach the school, with an average distance of 1.6 miles to the zone's edge and a maximum distance of 3.8 miles.
Source: National Center for Education Statistics (NCES), CA Dept. of Education

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Save this data and create your user profile. Create your own user account so you don't have to re-type your user data each time you request information. You'll also be able to track your information requests, get reminded of application dates, and more!

Username:

Password: