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Diamond Bar High

Public Grades 9-12

98^th

SchoolDigger Rank ?

of 2,162 California High Schools

Better than 95% of California high schools

Summary

Diamond Bar High is a public high school in Diamond Bar, California, serving 2,532 students in grades 9-12. The school is part of the Walnut Valley Unified School District, which is ranked 81 out of 1,543 districts in the state and has a 5-star rating from SchoolDigger.

Diamond Bar High consistently ranks among the top 5% of high schools in California, with exceptional academic performance. In 2024-2025, 76.32% of 11th-grade students and 76.32% of all students were proficient or better in English Language Arts/Literacy, significantly higher than the state averages. In mathematics, 68.33% of 11th-grade students and 68.33% of all students were proficient or better, again outperforming the state. The school's science proficiency rates, as measured by the CAST exam, are also impressive, with 53.69% of 12th-grade students and 53.6% of all students scoring proficient or better, compared to the state averages of 28.02% and 32.65%.

Within the Walnut Valley Unified School District, Diamond Bar High outperforms its counterpart, Walnut High, in academic achievement, graduation rates, and student subgroup performance. Compared to schools in other districts, such as Brea Olinda High and John A. Rowland High, Diamond Bar High demonstrates stronger overall academic performance and higher rankings. However, the school's performance for Asian students is not as exceptional, ranking between 159 and 197 out of 585-591 California high schools, suggesting room for improvement in supporting this subgroup.

2,563

Students ?

26.0

Student/teacher ratio ?

$19,649

Per pupil spending ?

22.6%

Free/discounted lunch ?

21400 Pathfinder Rd.
Diamond Bar, CA 91765-2747

(909) 594-1405

District: Walnut Valley Unified

Feeder schools for Diamond Bar High:

Elementary:	Castle Rock Elementary
	Evergreen Elementary
	Maple Hill Elementary
	Quail Summit Elementary
Middle:	Chaparral Middle
	South Pointe Middle

Racial breakdown:

Asian:

71.9%

Hispanic:

17.2%

White:

5.0%

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At a glance

▬ Ranking trend: Holding steady — 94th percentile in 2015 → 95th in 2025

Strengths

✓Test scores above the California average (66% vs 41% meeting standards)

✓Ranks in the top 5% of California high schools

✓96% graduate in 4 years — above the California average (88%)

Worth a look

!Some student groups rank well below the school's overall statewide standing

!Large classes — about 26 students per teacher

Students meeting standards (2024-2025) ?

This school66%

District avg72%

California avg41%

98^th of 2,162

California public high schools ?

Top 5%▲ up 1 pts since 2015

See the entire ranking list of California High Schools →

★★★★★

SchoolDigger rating ?

1^st of 2High Schools in the Walnut Valley Unified

81^st of 1,543Walnut Valley Unified among California districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	California percentile	Rating
2025	94.8	98 of 2162	95.5%	★★★★★
2024	96.1	84 of 2159	96.1%	★★★★★
2023	96.2	85 of 2170	96.1%	★★★★★
2022	94.3	125 of 2123	94.1%	★★★★★
2021	93.5	75 of 1290	94.2%	★★★★★
2019	95.9	83 of 2133	96.1%	★★★★★
2018	92.7	146 of 2017	92.8%	★★★★★
2017	93.1	126 of 2021	93.8%	★★★★★
2016	91.1	170 of 2039	91.7%	★★★★★
2015	93.4	117 of 1994	94.1%	★★★★★
2013	79.8	144 of 2426	94.1%	★★★★★
2012	77.8	176 of 2354	92.5%	★★★★★
2011	78.9	157 of 2367	93.4%	★★★★★
2010	82.1	108 of 2281	95.3%	★★★★★
2009	82.0	86 of 2238	96.2%	★★★★★
2008	85.8	56 of 2117	97.4%	★★★★★
2007	85.2	66 of 2063	96.8%	★★★★★
2006	81.7	102 of 1968	94.8%	★★★★★
2005	82.7	66 of 1901	96.5%	★★★★★
2004	80.3	71 of 1653	95.7%	★★★★★

African American

Year	Avg score	Statewide rank	California percentile	Rating
2025	85.9	50 of 523	90.4%	★★★★★
2023	84.4	67 of 521	87.1%	★★★★☆
2022	83.0	63 of 522	87.9%	★★★★☆
2019	89.0	41 of 592	93.1%	★★★★★
2018	88.3	63 of 582	89.2%	★★★★☆

Asian

Year	Avg score	Statewide rank	California percentile	Rating
2025	72.0	197 of 585	66.3%	★★★☆☆
2024	71.6	190 of 573	66.8%	★★★☆☆
2023	74.4	159 of 591	73.1%	★★★★☆
2022	72.1	174 of 581	70.1%	★★★★☆
2019	78.4	113 of 582	80.6%	★★★★☆
2018	74.3	167 of 581	71.3%	★★★★☆

Disabled

Year	Avg score	Statewide rank	California percentile	Rating
2022	84.3	107 of 1161	90.8%	★★★★★
2021	92.0	37 of 555	93.3%	★★★★★
2019	73.3	182 of 1117	83.7%	★★★★☆
2018	66.9	219 of 1052	79.2%	★★★★☆

English Language Learner

Year	Avg score	Statewide rank	California percentile	Rating
2024	90.8	41 of 1085	96.2%	★★★★★
2023	61.2	203 of 1064	80.9%	★★★★☆
2022	73.1	91 of 1044	91.3%	★★★★★
2021	99.9	3 of 467	99.4%	★★★★★
2019	99.6	5 of 941	99.5%	★★★★★
2018	99.9	7 of 938	99.3%	★★★★★

Female

Year	Avg score	Statewide rank	California percentile	Rating
2025	91.3	146 of 1906	92.3%	★★★★★
2024	95.1	83 of 1915	95.7%	★★★★★
2023	95.5	82 of 1915	95.7%	★★★★★
2022	92.4	143 of 1858	92.3%	★★★★★
2021	92.3	74 of 1054	93.0%	★★★★★
2019	93.7	100 of 1833	94.5%	★★★★★
2018	92.3	114 of 1760	93.5%	★★★★★

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2025	71.4	468 of 1900	75.4%	★★★★☆
2024	88.0	172 of 1902	91.0%	★★★★★
2023	84.8	236 of 1917	87.7%	★★★★☆
2022	83.2	213 of 1861	88.6%	★★★★☆
2019	82.0	236 of 1814	87.0%	★★★★☆
2018	68.6	524 of 1742	69.9%	★★★★☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2025	95.3	70 of 2013	96.5%	★★★★★
2024	96.0	73 of 2026	96.4%	★★★★★
2023	97.1	58 of 2030	97.1%	★★★★★
2022	97.9	42 of 1943	97.8%	★★★★★
2021	91.1	76 of 1126	93.3%	★★★★★
2019	97.3	46 of 1937	97.6%	★★★★★
2018	95.0	83 of 1862	95.5%	★★★★★

Male

Year	Avg score	Statewide rank	California percentile	Rating
2025	95.2	89 of 1942	95.4%	★★★★★
2024	95.6	90 of 1948	95.4%	★★★★★
2023	95.4	103 of 1963	94.8%	★★★★★
2022	94.7	110 of 1916	94.3%	★★★★★
2021	93.2	80 of 1122	92.9%	★★★★★
2019	96.2	75 of 1880	96.0%	★★★★★
2018	91.7	151 of 1834	91.8%	★★★★★

Multi-racial

Year	Avg score	Statewide rank	California percentile	Rating
2025	88.5	54 of 577	90.6%	★★★★★
2024	68.7	178 of 574	69.0%	★★★☆☆
2023	80.4	96 of 541	82.3%	★★★★☆
2022	71.9	130 of 515	74.8%	★★★★☆
2019	74.7	103 of 422	75.6%	★★★★☆
2018	77.5	73 of 366	80.1%	★★★★☆

Special Education

Year	Avg score	Statewide rank	California percentile	Rating
2025	51.5	456 of 1252	63.6%	★★★☆☆
2024	74.1	200 of 1216	83.6%	★★★★☆
2023	88.6	86 of 1197	92.8%	★★★★★

White

Year	Avg score	Statewide rank	California percentile	Rating
2025	63.2	431 of 1155	62.7%	★★★☆☆
2024	76.2	260 of 1173	77.8%	★★★★☆
2023	76.4	264 of 1193	77.9%	★★★★☆
2022	71.6	307 of 1204	74.5%	★★★★☆
2019	77.2	225 of 1222	81.6%	★★★★☆
2018	76.0	287 of 1173	75.5%	★★★★☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Low Socio Economic Status (2025)97th percentile~ school

English Language Learner (2024)96th percentile~ school

Male (2025)95th percentile~ school

Female (2025)92nd percentile-3 vs school

Disabled (2022)91st percentile-3 vs school

Multi-racial (2025)91st percentile-5 vs school

African American (2025)90th percentile-5 vs school

Hispanic (2025)75th percentile-20 vs school

Asian (2025)66th percentile-29 vs school

Special Education (2025)64th percentile-32 vs school

White (2025)63rd percentile-33 vs school

By subject vs California (2024-2025) ?

English Language Arts/Literacy76%+28 vs state

Mathematics68%+31 vs state

Science54%+21 vs state

5.0

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				CAST Science (2025)				Smarter Balanced Assessments English Language Arts/Literacy (2025)		Smarter Balanced Assessments Mathematics (2025)		Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	CAST Science 10th Grade	CAST Science 11th Grade	CAST Science 12th Grade	CAST Science All Grades	Smarter Balanced Assessments English Language Arts/Literacy 11th Grade	Smarter Balanced Assessments English Language Arts/Literacy All Grades	Smarter Balanced Assessments Mathematics 11th Grade	Smarter Balanced Assessments Mathematics All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Diamond Bar High	Public	9-12	21400 Pathfinder Rd.	Diamond Bar	91765	Los Angeles County	Walnut Valley Unified	No	(n/a)	No	(n/a)	(909) 594-1405	2,563	99	26.0	22.6%	128 (5.0%)	36 (1.4%)	440 (17.2%)	1,843 (71.9%)	0 (0.0%)	11 (0.4%)	105 (4.1%)	94.8	98^th of 2162 public high schools	95.5%		96.1	84^th of 2159 public high schools	96.1%	14			53.7	53.6	76.3	76.3	68.3	68.3	$19,649	$19,128	$521
Ron Hockwalt Academies (Continuation)	Public	9-12	476 South Lemon Ave.	Walnut	91789	Los Angeles County	Walnut Valley Unified	No	(n/a)	No	(n/a)	(909) 594-0776	36	7	5.0	27.8%	5 (13.9%)	0 (0.0%)	17 (47.2%)	13 (36.1%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)									$60,069	$58,236	$1,833
John A. Rowland High	Public	9-12	2000 South Otterbein St.	Rowland Heights	91748	Los Angeles County	Rowland Unified	No	(n/a)	No	(n/a)	(626) 965-3448	2,016	83	24.3	68.1%	49 (2.4%)	32 (1.6%)	922 (45.7%)	953 (47.3%)	0 (0.0%)	5 (0.2%)	53 (2.6%)	82.2	377^th of 2162 public high schools	82.6%		86.5	295^th of 2159 public high schools	86.3%	82	26.8	61.0	48.6	48.3	66.5	66.5	42.3	42.3	$16,290	$16,204	$86
Walnut High	Public	9-12	400 North Pierre Rd.	Walnut	91789	Los Angeles County	Walnut Valley Unified	No	(n/a)	No	(n/a)	(909) 594-1333	2,148	93	23.1	23.6%	80 (3.7%)	26 (1.2%)	663 (30.9%)	1,264 (58.8%)	2 (0.1%)	18 (0.8%)	94 (4.4%)	94.2	116^th of 2162 public high schools	94.6%		93.6	141^st of 2159 public high schools	93.5%	25		58.7		58.7	79.0	79.0	64.2	64.2	$21,189	$20,640	$549
Rowland Unified Community Day	Public	7-12	1928 Nogales St.	Rowland Heights	91748	Los Angeles County	Rowland Unified	No	(n/a)	No	(n/a)	(626) 935-8202	28	3	9.3	53.6%	2 (7.1%)	0 (0.0%)	15 (53.6%)	11 (39.3%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)									$4,439	$00	$4,439
Nogales High	Public	9-12	401 South Nogales St.	La Puente	91744	Los Angeles County	Rowland Unified	No	(n/a)	No	(n/a)	(626) 965-3437	1,535	78	19.6	82.8%	13 (0.8%)	17 (1.1%)	1,376 (89.6%)	101 (6.6%)	1 (0.1%)	7 (0.5%)	18 (1.2%)	43.7	1175^th of 2162 public high schools	45.7%		41.6	1203^rd of 2159 public high schools	44.3%	28		22.4		22.4	54.3	54.3	13.7	13.7	$20,001	$19,468	$533
Santana High (Continuation)	Public	9-12	341 South La Seda Rd.	La Puente	91744	Los Angeles County	Rowland Unified	No	(n/a)	No	(n/a)	(626) 965-5971	89	9	10.3	91.0%	1 (1.1%)	1 (1.1%)	86 (96.6%)	1 (1.1%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	16.4	1758^th of 2162 public high schools	18.7%		23	1630^th of 2159 public high schools	24.5%	128		0.0	21.4	4.8	23.2	23.2	3.6	3.6	$63,875	$61,834	$2,041
Brea Olinda High	Public	9-12	789 North Wildcat Way	Brea	92821	Orange County	Brea-Olinda Unified	No	(n/a)	No	(n/a)	(714) 990-7850	1,676	79	21.3	41.6%	408 (24.3%)	22 (1.3%)	657 (39.2%)	498 (29.7%)	3 (0.2%)	5 (0.3%)	83 (5.0%)	88.5	231^st of 2162 public high schools	89.3%		87.6	269^th of 2159 public high schools	87.5%	38		55.5		55.3	69.3	69.3	51.0	51.0	$23,421	$22,236	$1,185
Brea Canyon High (Continuation)	Public	9-12	689 North Wildcat Way	Brea	92821	Orange County	Brea-Olinda Unified	No	(n/a)	No	(n/a)	(714) 990-7882	41	7	5.9	43.9%	13 (31.7%)	2 (4.9%)	22 (53.7%)	1 (2.4%)	1 (2.4%)	0 (0.0%)	2 (4.9%)	12.8	1886^th of 2162 public high schools	12.8%		12	1954^th of 2159 public high schools	9.5%	68		10.0		9.5	5.0	5.0	5.0	5.0	$81,722	$78,938	$2,784
Diamond Ranch High	Public	9-12	100 Diamond Ranch Dr.	Pomona	91766	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4715	1,542	68	22.5	78.7%	50 (3.2%)	77 (5.0%)	1,204 (78.1%)	159 (10.3%)	0 (0.0%)	7 (0.5%)	45 (2.9%)	59	848^th of 2162 public high schools	60.8%		64.7	656^th of 2159 public high schools	69.6%	192	21.2		23.3	22.2	67.9	67.9	26.3	26.3	$12,518	$11,462	$1,056

Frequently Asked Questions about Diamond Bar High

Is Diamond Bar High a good school?

Yes! Diamond Bar High is one of the best high schools in the state. It ranks 98^th of 2162 California high schools.

What schools feed into Diamond Bar High?

Diamond Bar High is fed by the following schools:

Elementary : Castle Rock Elementary
Elementary : Evergreen Elementary
Elementary : Maple Hill Elementary
Elementary : Quail Summit Elementary
Middle : Chaparral Middle
Middle : South Pointe Middle

What district is Diamond Bar High in?

Walnut Valley Unified

What is the racial makeup of Diamond Bar High?

Students at Diamond Bar High are 72% Asian, 17% Hispanic, 5% White, 4% Two or more races, 1% African American.

How many students attend Diamond Bar High?

In the 2024-25 school year, 2,563 students attended Diamond Bar High.

Rate Diamond Bar High!

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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the California Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.