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Diamond Ranch High

Q: Is Diamond Ranch High a good school?

Diamond Ranch High ranks 848 th of 2162 California high schools. SchoolDigger rates this school 3 stars out of 5.

Public Grades 9-12

848^th

SchoolDigger Rank ?

of 2,162 California High Schools

Better than 61% of California high schools

Summary

Diamond Ranch High is a large public high school serving grades 9-12 to approximately 1,542 students in the Pomona Unified district, operating in a high-need community where a majority of students qualify for free or reduced-price lunch.

The school presents a compelling story of strengths and challenges: it achieves an exceptionally strong graduation rate of 95.8%, outperforming both its district and the state, and it is the highest-ranked comprehensive high school within Pomona Unified. Its English Language Arts proficiency is nearly double the district average, and it has shown remarkable success in supporting vulnerable populations like homeless students. However, proficiency in math and science remains a significant challenge, and the school's statewide ranking has declined in recent years, with a particularly sharp drop in performance for students in special education programs.

When compared to nearby schools, Diamond Ranch High stands out within its own district but faces gaps when measured against schools in more affluent neighboring districts. For instance, it significantly outperforms other Pomona Unified schools like Ganesha High and Fremont Academy of Engineering and Design in core subjects, yet its math proficiency trails far behind a school like Walnut High in the Walnut Valley Unified district. Interestingly, Diamond Ranch achieves its relatively strong outcomes with lower per-student spending than some peers, such as Park West High (Continuation), suggesting effective use of resources in supporting students to graduation.

1,542

Students ?

22.5

Student/teacher ratio ?

$18,971

Per pupil spending ?

78.7%

Free/discounted lunch ?

100 Diamond Ranch Dr.
Pomona, CA 91766-4723

(909) 397-4715

District: Pomona Unified

Feeder schools for Diamond Ranch High:

Elementary:	Armstrong Elementary
	Decker Elementary
	Golden Springs Elementary
	Pantera Elementary
	More...
	Ranch Hills Elementary
Middle:	Lorbeer Middle

Racial breakdown:

Hispanic:

78.1%

Asian:

10.3%

African American:

5.0%

See top rated California high schools

Compare Diamond Ranch High to nearby high schools!

At a glance

▼ Ranking trend: Declining — 73rd percentile in 2013 → 61st in 2025

Strengths

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

✓Above the California median (61st percentile)

Worth a look

!Test scores below the California average (35% vs 41% meeting standards)

!Ranking has slipped — down 12 percentile points since 2013

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

Students meeting standards (2024-2025) ?

This school35%

District avg28%

California avg41%

848^th of 2,162

California public high schools ?

Top 39%▼ down 15 pts since 2015

From top 24% (2015) to top 39% (2025)

See the entire ranking list of California High Schools →

★★★★★

SchoolDigger rating ?

2^nd of 7High Schools in the Pomona Unified

1092^nd of 1,543Pomona 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	59.0	848 of 2162	60.8%	★★★☆☆
2024	64.7	656 of 2159	69.6%	★★★☆☆
2023	70.2	569 of 2170	73.8%	★★★★☆
2022	72.7	486 of 2123	77.1%	★★★★☆
2019	79.5	374 of 2133	82.5%	★★★★☆
2018	63.4	734 of 2017	63.6%	★★★☆☆
2017	71.4	572 of 2021	71.7%	★★★★☆
2016	71.7	525 of 2039	74.3%	★★★★☆
2015	73.2	485 of 1994	75.7%	★★★★☆
2013	55.0	657 of 2426	72.9%	★★★★☆
2012	57.1	616 of 2354	73.8%	★★★★☆
2011	52.3	732 of 2367	69.1%	★★★☆☆
2010	57.9	562 of 2281	75.4%	★★★★☆
2009	56.8	552 of 2238	75.3%	★★★★☆
2008	60.1	471 of 2117	77.8%	★★★★☆
2007	64.8	355 of 2063	82.8%	★★★★☆
2006	61.6	439 of 1968	77.7%	★★★★☆
2005	60.3	407 of 1901	78.6%	★★★★☆
2004	61.4	320 of 1653	80.6%	★★★★☆

African American

Year	Avg score	Statewide rank	California percentile	Rating
2025	47.8	240 of 523	54.1%	★★★☆☆
2024	65.5	138 of 517	73.3%	★★★★☆
2023	88.4	50 of 521	90.4%	★★★★★
2022	85.7	52 of 522	90.0%	★★★★★
2019	74.1	109 of 592	81.6%	★★★★☆
2018	57.3	211 of 582	63.7%	★★★☆☆

Asian

Year	Avg score	Statewide rank	California percentile	Rating
2025	48.8	342 of 585	41.5%	★★☆☆☆
2024	53.9	317 of 573	44.7%	★★☆☆☆
2023	54.6	318 of 591	46.2%	★★☆☆☆
2022	64.1	233 of 581	59.9%	★★★☆☆
2019	78.9	108 of 582	81.4%	★★★★☆
2018	46.7	352 of 581	39.4%	★★☆☆☆

Disabled

Year	Avg score	Statewide rank	California percentile	Rating
2022	42.8	514 of 1161	55.7%	★★★☆☆
2019	31.3	744 of 1117	33.4%	★★☆☆☆
2018	24.1	846 of 1052	19.6%	★☆☆☆☆

English Language Learner

Year	Avg score	Statewide rank	California percentile	Rating
2024	57.8	226 of 1085	79.2%	★★★★☆
2023	44.5	456 of 1064	57.1%	★★★☆☆
2022	54.1	273 of 1044	73.9%	★★★★☆
2019	92.1	31 of 941	96.7%	★★★★★
2018	56.8	243 of 938	74.1%	★★★★☆

Female

Year	Avg score	Statewide rank	California percentile	Rating
2025	55.8	798 of 1906	58.1%	★★★☆☆
2024	64.3	590 of 1915	69.2%	★★★☆☆
2023	75.1	421 of 1915	78.0%	★★★★☆
2022	70.4	457 of 1858	75.4%	★★★★☆
2019	77.1	371 of 1833	79.8%	★★★★☆
2018	58.9	744 of 1760	57.7%	★★★☆☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2025	59.8	713 of 1900	62.5%	★★★☆☆
2024	67.1	524 of 1902	72.5%	★★★★☆
2023	73.0	429 of 1917	77.6%	★★★★☆
2022	79.6	274 of 1861	85.3%	★★★★☆
2019	82.6	220 of 1814	87.9%	★★★★☆
2018	61.7	640 of 1742	63.3%	★★★☆☆

Homeless

Year	Avg score	Statewide rank	California percentile	Rating
2025	83.8	41 of 410	90.0%	★★★★★
2024	74.1	59 of 328	82.0%	★★★★☆
2023	90.7	22 of 299	92.6%	★★★★★
2022	87.2	18 of 290	93.8%	★★★★★

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2025	58.6	782 of 2013	61.2%	★★★☆☆
2024	64.2	611 of 2026	69.8%	★★★☆☆
2023	74.7	407 of 2030	80.0%	★★★★☆
2022	79.1	294 of 1943	84.9%	★★★★☆
2019	84.8	213 of 1937	89.0%	★★★★☆
2018	65.8	609 of 1862	67.3%	★★★☆☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2025	57.5	780 of 1942	59.8%	★★★☆☆
2024	59.4	701 of 1948	64.0%	★★★☆☆
2023	60.4	660 of 1963	66.4%	★★★☆☆
2022	70.9	478 of 1916	75.1%	★★★★☆
2019	77.5	369 of 1880	80.4%	★★★★☆
2018	62.3	681 of 1834	62.9%	★★★☆☆

Multi-racial

Year	Avg score	Statewide rank	California percentile	Rating
2025	50.9	292 of 577	49.4%	★★☆☆☆
2023	70.1	157 of 541	71.0%	★★★★☆
2019	65.9	141 of 422	66.6%	★★★☆☆

Special Education

Year	Avg score	Statewide rank	California percentile	Rating
2025	32.2	824 of 1252	34.2%	★★☆☆☆
2024	54.9	400 of 1216	67.1%	★★★☆☆
2023	62.2	283 of 1197	76.4%	★★★★☆

White

Year	Avg score	Statewide rank	California percentile	Rating
2025	76.0	260 of 1155	77.5%	★★★★☆
2024	64.5	420 of 1173	64.2%	★★★☆☆
2023	62.9	438 of 1193	63.3%	★★★☆☆
2022	72.5	291 of 1204	75.8%	★★★★☆
2019	63.8	435 of 1222	64.4%	★★★☆☆
2018	54.3	596 of 1173	49.2%	★★☆☆☆

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)

Homeless (2025)90th percentile+29 vs school

English Language Learner (2024)79th percentile+10 vs school

White (2025)77th percentile+17 vs school

Hispanic (2025)62nd percentile~ school

Low Socio Economic Status (2025)61st percentile~ school

Male (2025)60th percentile~ school

Female (2025)58th percentile-3 vs school

Disabled (2022)56th percentile-21 vs school

African American (2025)54th percentile-7 vs school

Multi-racial (2025)49th percentile-11 vs school

Asian (2025)42nd percentile-19 vs school

Special Education (2025)34th percentile-27 vs school

By subject vs California (2024-2025) ?

English Language Arts/Literacy68%+19 vs state

Mathematics26%-11 vs state

Science22%-10 vs state

5.0

2 ratings · 1 written review

5★2

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What people are saying

by a parent
Friday, April 11, 2014

This is the best high school. My daughter attends this school and gets a lot improvement. She now is a Biology major in UC Berkeley. Most of her friends from Diamond Ranch high attend top 5 public universities in Ca now. They all love this school a lot. Teachers are friendly and always encourage students. Environment is safe. I strongly recommend this school to you. Close Quote

Schools Near Diamond Ranch High

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 (2024)
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 8th Grade	CAST Science 10th Grade	CAST Science 11th Grade	CAST Science 12th Grade	CAST Science All Grades	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 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	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
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	$18,971	$2,316	$16,655
Garey High	Public	9-12	321 West Lexington Ave.	Pomona	91766	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4451	1,567	75	20.9	91.4%	22 (1.4%)	36 (2.3%)	1,450 (92.5%)	38 (2.4%)	3 (0.2%)	3 (0.2%)	15 (1.0%)	53.6	960^th of 2162 public high schools	55.6%		41.1	1222^nd of 2159 public high schools	43.4%	262			26.5	20.8	23.5				53.4	53.4				25.9	25.9	$20,129	$2,546	$17,583
Fremont Academy of Engineering and Design	Public	7-12	725 West Franklin Ave.	Pomona	91766	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4521	597	32	18.6	93.1%	4 (0.7%)	6 (1.0%)	560 (93.8%)	21 (3.5%)	1 (0.2%)	0 (0.0%)	5 (0.8%)	46.3	1108^th of 2162 public high schools	48.8%		45.1	1120^th of 2159 public high schools	48.1%	12	11.0			14.9	12.6		27.1	35.1	56.5	36.3		14.9	12.6	17.7	14.5	$22,717	$3,171	$19,546
Park West High (Continuation)	Public	9-12	1460 West Holt Ave. Ste. 100	Pomona	91768	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4900	225	15	15.0	90.7%	4 (1.8%)	7 (3.1%)	211 (93.8%)	1 (0.4%)	0 (0.0%)	0 (0.0%)	2 (0.9%)	16.6	1754^th of 2162 public high schools	18.9%		15.4	1809^th of 2159 public high schools	16.2%	55				6.8	6.8				10.3	10.3				5.8	5.8	$32,059	$6,001	$26,058
School of Arts and Enterprise	Public, Charter	6-12	295 North Garey Ave.	Pomona	91768	Los Angeles County	School of Arts and Enterprise District	Yes	(n/a)	No	(n/a)	(909) 622-0699	647	53	12.3	68.5%	54 (8.3%)	28 (4.3%)	519 (80.2%)	8 (1.2%)	1 (0.2%)	0 (0.0%)	37 (5.7%)	66.2	669^th of 2162 public high schools	69.1%		61.1	737^th of 2159 public high schools	65.9%	68	23.4		44.6		31.8	39.6	41.7	48.0	69.5	49.9	22.0	15.9	19.7	16.9	18.3	$22,496	$2,316	$20,180
International Polytechnic High	Public	9-12	3851 West Temple Ave. Bldg. 12	Pomona	91768	Los Angeles County	Los Angeles County Office of Education	No	(n/a)	No	(n/a)	(909) 839-2320	458	22	20.6	26.9%	18 (3.9%)	11 (2.4%)	296 (64.6%)	109 (23.8%)	0 (0.0%)	1 (0.2%)	21 (4.6%)	91	182^nd of 2162 public high schools	91.6%		84.6	332^nd of 2159 public high schools	84.6%	150			48.8		48.8				87.7	87.7				50.9	50.9	$18,086	$1,594	$16,492
Ganesha High	Public	9-12	1151 Fairplex Dr.	Pomona	91768	Los Angeles County	Pomona Unified	No	(n/a)	No	(n/a)	(909) 397-4400	895	44	20.2	91.8%	19 (2.1%)	20 (2.2%)	830 (92.7%)	10 (1.1%)	2 (0.2%)	2 (0.2%)	11 (1.2%)	22	1651^st of 2162 public high schools	23.6%		29.3	1506^th of 2159 public high schools	30.2%	145			12.2		11.6				28.6	28.6				9.8	9.8	$21,525	$2,978	$18,547
Ruben S. Ayala High	Public	9-12	14255 Peyton Ave.	Chino Hills	91709	San Bernardino County	Chino Valley Unified	No	(n/a)	No	(n/a)	(909) 627-3584	2,541	98	25.9		339 (13.3%)	59 (2.3%)	988 (38.9%)	1,063 (41.8%)	1 (0.0%)	10 (0.4%)	81 (3.2%)	92.4	159^th of 2162 public high schools	92.6%		92.4	173^rd of 2159 public high schools	92.0%	14			56.8		56.3				77.5	77.5				55.4	55.4
Don Antonio Lugo High	Public	9-12	13400 Pipeline Ave.	Chino	91710	San Bernardino County	Chino Valley Unified	No	(n/a)	No	(n/a)	(909) 591-3902	1,256	65	19.2	82.2%	118 (9.4%)	25 (2.0%)	1,056 (84.1%)	34 (2.7%)	2 (0.2%)	0 (0.0%)	19 (1.5%)	61.7	774^th of 2162 public high schools	64.2%		62.5	709^th of 2159 public high schools	67.2%	65			33.0		32.4				64.7	64.7				23.1	23.1
Boys Republic High	Public	9-12	3493 Grand Ave.	Chino Hills	91709	San Bernardino County	Chino Valley Unified	No	(n/a)	No	(n/a)	(909) 902-6690	47	8	5.9	91.5%	6 (12.8%)	12 (25.5%)	29 (61.7%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	6.9	2157^th of 2162 public high schools	0.2%		9.3	2105^th of 2159 public high schools	2.5%	52			0.0		0.0				0.0	0.0				0.0	0.0

Frequently Asked Questions about Diamond Ranch High

Is Diamond Ranch High a good school?

Diamond Ranch High ranks 848^th of 2162 California high schools. SchoolDigger rates this school 3 stars out of 5.

What is the racial makeup of Diamond Ranch High?

Students at Diamond Ranch High are 78% Hispanic, 10% Asian, 5% African American, 3% White, 3% Two or more races.

How many students attend Diamond Ranch High?

In the 2024-25 school year, 1,542 students attended Diamond Ranch High.

What district is Diamond Ranch High in?

Pomona Unified

What schools feed into Diamond Ranch High?

Diamond Ranch High is fed by the following schools:

Elementary : Armstrong Elementary
Elementary : Decker Elementary
Elementary : Golden Springs Elementary
Elementary : Pantera Elementary
Elementary : Ranch Hills Elementary
Middle : Lorbeer Middle

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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.