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Best Public Schools in Diamond Bar, CA

New rankings! California test scores for the 2025-26 school year were just released — SchoolDigger posted updated rankings this week.

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At a glance

Schools

8,396

Students

Districts

5-star schools

Top rankedChaparral Middle60^th of 2,703 California middle schools

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Biggest riser

Pantera Elementary up 109 spots statewide this year

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Smallest classes

Armstrong Elementary 18.5 students per teacher

SchoolDigger ratings

5★

4★

3★

2★

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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 Immunizations Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				CSA Spanish Overall (2026)			CSA Spanish Listening (2026)			CSA Spanish Writing (2026)			CSA Spanish Reading (2026)			CAST Science (2026)				Smarter Balanced Assessments English Language Arts/Literacy (2026)								Smarter Balanced Assessments Mathematics (2026)								% Completely Immunized (2022)	% Polio (2022)	% Hepatitis B (2022)	% Varicella (2022)	% DTP (2022)	% MMR (2022)	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/reduced lunch (2024-25)	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	CSA Spanish Overall 7th Grade	CSA Spanish Overall 8th Grade	CSA Spanish Overall All Grades	CSA Spanish Listening 7th Grade	CSA Spanish Listening 8th Grade	CSA Spanish Listening All Grades	CSA Spanish Writing 7th Grade	CSA Spanish Writing 8th Grade	CSA Spanish Writing All Grades	CSA Spanish Reading 7th Grade	CSA Spanish Reading 8th Grade	CSA Spanish Reading All Grades	CAST Science 5th Grade	CAST Science 8th Grade	CAST Science 12th Grade	CAST Science All Grades	Smarter Balanced Assessments English Language Arts/Literacy 3rd Grade	Smarter Balanced Assessments English Language Arts/Literacy 4th Grade	Smarter Balanced Assessments English Language Arts/Literacy 5th Grade	Smarter Balanced Assessments English Language Arts/Literacy 6th Grade	Smarter Balanced Assessments English Language Arts/Literacy 7th Grade	Smarter Balanced Assessments English Language Arts/Literacy 8th Grade	Smarter Balanced Assessments English Language Arts/Literacy 11th Grade	Smarter Balanced Assessments English Language Arts/Literacy All Grades	Smarter Balanced Assessments Mathematics 3rd Grade	Smarter Balanced Assessments Mathematics 4th Grade	Smarter Balanced Assessments Mathematics 5th Grade	Smarter Balanced Assessments Mathematics 6th Grade	Smarter Balanced Assessments Mathematics 7th Grade	Smarter Balanced Assessments Mathematics 8th Grade	Smarter Balanced Assessments Mathematics 11th Grade	Smarter Balanced Assessments Mathematics All Grades	% Completely Immunized KG	% Polio KG	% Hepatitis B KG	% Varicella KG	% DTP KG	% MMR KG	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Armstrong Elementary	Public	K-6	22750 Beaverhead Dr.	Diamond Bar	91765	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4563	251	14	18.5	66.9%	25 (10.0%)	16 (6.4%)	150 (59.8%)	37 (14.7%)	0 (0.0%)	0 (0.0%)	23 (9.2%)	40.6	3183^rd of 5804 public elementary schools	45.2%		42.4	3044^th of 5857 public elementary schools	48.0%	139													36.8			36.8	36.4	44.0	62.2	33.3				45.4	33.3	16.0	23.7	29.2				25.8							$28,404	$27,084	$1,320
Golden Springs Elementary	Public	K-6	245 South Ballena Dr.	Diamond Bar	91765	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4596	388	16	25.0	72.2%	24 (6.2%)	14 (3.6%)	267 (68.8%)	61 (15.7%)	0 (0.0%)	0 (0.0%)	22 (5.7%)	62.7	1943^rd of 5804 public elementary schools	66.5%		60.7	2029^th of 5857 public elementary schools	65.4%	86													37.3			37.3	57.4	58.5	60.0	52.9				57.0	57.4	43.4	23.9	45.7				41.8							$15,868	$14,520	$1,348
Lorbeer Middle	Public	7-8	501 Diamond Bar Blvd.	Diamond Bar	91765	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4527	688	29	24.0	74.3%	32 (4.7%)	25 (3.6%)	505 (73.4%)	90 (13.1%)	2 (0.3%)	1 (0.1%)	33 (4.8%)	51	1143^rd of 2703 public middle schools	57.7%		48.4	1228^th of 2761 public middle schools	55.5%	85	0.0	3.7	1.5	9.8	18.5	13.2	4.9	3.7	4.4	0.0	3.7	1.5		32.7		32.7					49.4	51.7		50.6					32.4	33.0		32.7							$22,294	$21,034	$1,260
Pantera Elementary	Public	K-6	801 Pantera Dr.	Diamond Bar	91765	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4475	512	22	23.6	47.9%	23 (4.5%)	7 (1.4%)	98 (19.1%)	349 (68.2%)	0 (0.0%)	0 (0.0%)	35 (6.8%)	95.9	244^th of 5804 public elementary schools	95.8%		94.8	353^rd of 5857 public elementary schools	94.0%	109													64.9			64.9	76.3	91.9	78.9	82.6				82.4	83.3	94.7	78.1	58.7				80.9							$14,816	$13,418	$1,398
Castle Rock Elementary	Public	K-5	2975 Castle Rock Rd.	Diamond Bar	91765	Los Angeles County	Walnut Valley Unified	No	(n/a)	No	(n/a)	(909) 598-5006	684	26	26.1	26.6%	20 (2.9%)	10 (1.5%)	132 (19.3%)	480 (70.2%)	1 (0.1%)	4 (0.6%)	37 (5.4%)	86.3	845^th of 5804 public elementary schools	85.4%		90.9	613^th of 5857 public elementary schools	89.5%	232													52.4			52.4	70.1	64.2	64.3					66.0	68.5	71.8	64.1					67.8							$16,254	$15,832	$422
Chaparral Middle	Public	6-8	1405 South Spruce Tree Dr.	Diamond Bar	91765	Los Angeles County	Walnut Valley Unified	No	(n/a)	No	(n/a)	(909) 861-6227	1,349	48	28.2	24.6%	48 (3.6%)	16 (1.2%)	195 (14.5%)	1,045 (77.5%)	0 (0.0%)	0 (0.0%)	45 (3.3%)	97.4	60^th of 2703 public middle schools	97.8%		97.6	60^th of 2761 public middle schools	97.8%															69.6		69.6				77.6	82.6	83.6		81.4				78.0	82.0	82.8		81.0							$14,509	$14,034	$475
Evergreen Elementary	Public	K-5	2450 Evergreen Springs Dr.	Diamond Bar	91765	Los Angeles County	Walnut Valley Unified	No	(n/a)	No	(n/a)	(909) 594-1041	709	28	24.9	25.8%	22 (3.1%)	8 (1.1%)	146 (20.6%)	499 (70.4%)	0 (0.0%)	2 (0.3%)	32 (4.5%)	89.1	698^th of 5804 public elementary schools	88.0%		92.2	534^th of 5857 public elementary schools	90.9%	164													61.7			61.7	61.5	68.9	75.5					69.0	71.5	62.5	69.5					68.0	93.3	93.3	93.3	93.3	93.3	93.3	$15,848	$15,262	$586
Maple Hill Elementary	Public	K-5	1350 Maple Hill Rd.	Diamond Bar	91765	Los Angeles County	Walnut Valley Unified	No	(n/a)	No	(n/a)	(909) 861-6224	556	21	27.1	27.3%	15 (2.7%)	0 (0.0%)	70 (12.6%)	445 (80.0%)	0 (0.0%)	2 (0.4%)	24 (4.3%)	96.3	206^th of 5804 public elementary schools	96.5%		97.1	142^nd of 5857 public elementary schools	97.6%	64													65.4			65.4	80.0	83.8	82.5					82.1	84.6	82.7	72.4					79.9							$16,342	$16,004	$338
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	102^nd of 2137 public high schools	95.2%		94.8	98^th of 2162 public high schools	95.5%	4															57.7	57.7							78.2	78.2							67.8	67.8							$19,649	$19,128	$521
Quail Summit Elementary	Public	K-5	23330 East Quail Summit Dr.	Diamond Bar	91765	Los Angeles County	Walnut Valley Unified	No	(n/a)	No	(n/a)	(909) 861-3004	696	28	25.3	25.0%	22 (3.2%)	11 (1.6%)	112 (16.1%)	517 (74.3%)	0 (0.0%)	0 (0.0%)	34 (4.9%)	95.1	317^th of 5804 public elementary schools	94.5%		95.5	284^th of 5857 public elementary schools	95.2%	33													75.5			75.5	71.7	69.4	82.2					74.8	81.3	76.4	84.2					80.7							$16,267	$15,780	$487

Cities Near Diamond Bar

City	Distance	# of Schools	Statewide Rank
Walnut	2.05 mi	11	84^th
Pomona	2.56 mi	37	663^rd
Chino Hills	3.63 mi	16	150^th
West Covina	3.67 mi	26	322^nd
Rowland Heights	3.7 mi	10	310^th

See the top CA California cities

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.