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Best Elementary Schools in Zip Code 91765

Coming soon: We're expecting this year's test scores from the California Department of Education any day now — new rankings will be posted the moment they're released!

Coming soon: This year's test scores are expected from the California Department of Education any day now — new rankings will follow the moment they're released!

At a glance

Schools

3,796

Students

Districts

5-star schools

Top rankedMaple Hill Elementary142^nd of 5,857 California elementary schools

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Biggest riser

Castle Rock Elementary up 178 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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Summary:

This analysis examines seven elementary schools (grades K-5/K-6) in zip code 91765, serving Diamond Bar, California, which are split between the high-performing Walnut Valley Unified district and the lower-performing Pomona Unified district.

Overall, schools in the Walnut Valley Unified district, like top-ranked Maple Hill Elementary and Quail Summit Elementary, consistently achieve very high state test scores and have very low chronic absenteeism. In contrast, most schools in the Pomona Unified district, such as Armstrong Elementary and Golden Springs Elementary, perform below state averages and struggle with significantly higher chronic absenteeism.

A notable exception is Pantera Elementary, which performs exceptionally well despite being in the Pomona Unified district, rivaling the top Walnut Valley schools. Interestingly, schools that spend more per student do not necessarily perform better academically, and lower student-teacher ratios are not linked to higher test scores in this area.

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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 (2025)				Ranking (2024)				CAST Science (2025)		Smarter Balanced Assessments English Language Arts/Literacy (2025)					Smarter Balanced Assessments Mathematics (2025)					% 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/Discounted Lunch Recipients (2025)	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 5th 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 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 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%)	42.4	3044^th of 5857 public elementary schools	48.0%		55.5	2259^th of 5869 public elementary schools	61.5%	785	24.0	24.0	37.9	40.5	68.0	48.0	47.4	37.9	18.9	36.0	28.0	29.3							$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%)	60.7	2029^th of 5857 public elementary schools	65.4%		57.9	2153^rd of 5869 public elementary schools	63.3%	124	33.3	33.3	60.0	71.4	50.8	56.3	59.8	43.4	45.7	31.8	33.3	38.5							$15,868	$14,520	$1,348
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%)	94.8	353^rd of 5857 public elementary schools	94.0%		97	168^th of 5869 public elementary schools	97.1%	185	63.5	63.5	71.2	84.7	82.4	88.5	81.4	82.4	80.8	58.1	77.1	74.5							$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%)	90.9	613^th of 5857 public elementary schools	89.5%		88.4	791^st of 5869 public elementary schools	86.5%	178	59.0	59.0	71.6	65.1	76.6		71.2	77.5	71.0	65.0		70.5							$16,254	$15,832	$422
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%)	92.2	534^th of 5857 public elementary schools	90.9%		94.5	386^th of 5869 public elementary schools	93.4%	148	65.0	65.0	74.1	68.7	74.6		72.4	73.0	70.6	71.4		71.6	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%)	97.1	142^nd of 5857 public elementary schools	97.6%		97.1	155^th of 5869 public elementary schools	97.4%	13	76.2	76.2	73.9	85.9	87.3		82.5	80.7	83.2	84.8		82.9							$16,342	$16,004	$338
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%)	95.5	284^th of 5857 public elementary schools	95.2%		97.2	142^nd of 5869 public elementary schools	97.6%	142	69.2	69.2	72.3	75.6	82.6		76.7	76.5	86.2	82.9		81.9							$16,267	$15,780	$487

Cities Near Zip Code 91765

City	Distance	# of Schools	Statewide Rank
Diamond Bar	0.45 mi	10	118^th
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

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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.