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Diamond Ranch High

Q: Is Diamond Ranch High a good school?

Diamond Ranch High ranks 780 th of 2135 California high schools. SchoolDigger rates this school 3 stars out of 5.

Public Grades 9-12

780^th

SchoolDigger Rank ?

of 2,135 California High Schools

Better than 63% of California high schools

Summary

Diamond Ranch High is a 1,542-student school serving grades 9–12 in Pomona, within Pomona Unified. Chronic absenteeism is a concern: 27% of students were chronically absent in 2025–2026, compared with 18% statewide and 24% districtwide. Graduation was stronger, at 93%, versus 88% statewide, and the dropout rate was lower, at 3% versus 8% statewide. The most important academic takeaway is that results are uneven: ELA is a clear strength, while science is the largest current weakness.

ELA proficiency was 68% in 2025–2026, 19 percentage points above California and 29 points above the district; it was higher than five nearby schools with reported results and lower than four. Science proficiency was 21%, 15 points below the state and 2 below the district, and seven nearby schools had higher results. Math proficiency was 31%; four nearby schools were higher and five lower among those with reported results. Overall, the school’s strong ELA result does not translate into equally strong performance across subjects.

Over time, ELA was essentially unchanged from 2022–2023 to 2025–2026, while math rose by 7 percentage points and science fell by 7 points. SchoolDigger placed the school at the 64th statewide percentile in 2025–2026, with 3 stars and a rank of 780 out of 2,137—up 3 percentile points from the prior year, but down 13 from 2021–2022. Its 2024–2025 student–teacher ratio was 22.5, the third-highest among nearby schools, and 79% of students were free/reduced lunch eligible that year. SchoolDigger’s subgroup rankings show a notable contrast: homeless students ranked at the 90th percentile in 2024–2025, versus the school’s overall 61st percentile that year, while Asian students ranked at the 33rd percentile in 2025–2026, below the school’s overall 64th percentile.

1,542

Students ?

22.5

Student/teacher ratio ?

$15,304

Per pupil spending ?

78.7%

Free/reduced lunch eligible (2024-25) ?

All students in California receive free school meals.

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 — 76th percentile in 2015 → 63rd in 2026

Strengths

✓93% graduate in 4 years — above the California average (88%)

✓Above the California median (63rd percentile)

Worth a look

!High chronic absenteeism (27% vs 18% California)

!Ranking has slipped — down 13 percentile points since 2015

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

Students meeting standards (2025-2026) ?

This school39%

District avg30%

California avg42%

780^th of 2,135

California public high schools ?

Top 37%▼ down 11 pts since 2016

From top 26% (2016) to top 37% (2026)

See the entire ranking list of California High Schools →

★★★★★

SchoolDigger rating ?

3^rd of 7High Schools in the Pomona Unified

1048^th of 1,530Pomona 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
2026	61.8	780 of 2135	63.5%	★★★☆☆
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
2026	39.7	384 of 575	33.2%	★★☆☆☆
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
2026	55.6	792 of 1864	57.5%	★★★☆☆
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
2026	63.4	618 of 1880	67.1%	★★★☆☆
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
2026	62.9	669 of 1997	66.5%	★★★☆☆
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
2026	60.2	722 of 1930	62.6%	★★★☆☆
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
2026	36.0	713 of 1235	42.3%	★★☆☆☆
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 (2026)67th percentile+4 vs school

Low Socio Economic Status (2026)66th percentile+3 vs school

Male (2026)63rd percentile~ school

Female (2026)58th percentile-6 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

Special Education (2026)42nd percentile-21 vs school

Asian (2026)33rd percentile-30 vs school

By subject vs California (2025-2026) ?

English Language Arts/Literacy68%+19 vs state

Mathematics31%-8 vs state

Science21%-15 vs state

5.0

2 ratings · 1 written review

5★2

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2★0

1★0

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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

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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 (2026)				Ranking (2025)				CAST Science (2026)					Smarter Balanced Assessments English Language Arts/Literacy (2026)					Smarter Balanced Assessments Mathematics (2026)					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	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%)	61.8	780^th of 2135 public high schools	63.5%		59	848^th of 2162 public high schools	60.8%	68				21.4	21.4				67.9	67.9				30.6	30.6	$15,304	$1,056	$14,248
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%)	68.7	648^th of 2135 public high schools	69.6%		53.6	960^th of 2162 public high schools	55.6%	312			42.1	0.0	40.0				61.1	61.1				35.5	35.5	$18,847	$1,260	$17,587
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%)	56.6	889^th of 2135 public high schools	58.4%		46.3	1108^th of 2162 public high schools	48.8%	219	10.5		32.4	34.0	21.5		40.6	20.5	58.7	36.8		16.5	25.6	20.8	21.0	$24,033	$1,501	$22,532
School of Arts and Enterprise	Public, Charter	6-12	295 North Garey Ave.	Pomona	91767	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%)	59.5	828^th of 2135 public high schools	61.2%		66.2	669^th of 2162 public high schools	69.1%	159	28.4		46.5		35.5	44.4	45.0	47.7	60.9	49.4	20.4	6.3	8.2	15.7	11.5	$23,216	$2,182	$21,034
International Polytechnic High	Public	9-12	3851 West Temple Ave. Bldg. 128-16	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%)	93.7	120^th of 2135 public high schools	94.4%		91	182^nd of 2162 public high schools	91.6%	62			57.7		57.7				88.7	88.7				59.8	59.8	$18,236	$534	$17,702
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%)	43.4	1189^th of 2135 public high schools	44.3%		22	1651^st of 2162 public high schools	23.6%	462			25.1	27.3	25.1				42.6	42.6				26.1	26.1	$26,597	$1,313	$25,284
Ruben S. Ayala High	Public	9-12	14255 Peyton Ave.	Chino Hills	91710	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%)	92.6	143^rd of 2135 public high schools	93.3%		92.4	159^th of 2162 public high schools	92.6%	16			60.5		60.4				81.8	81.8				56.4	56.4	$16,216	$931	$15,285
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%)	64.4	727^th of 2135 public high schools	65.9%		61.7	774^th of 2162 public high schools	64.2%	47			37.5		36.8				68.1	68.1				26.9	26.9	$20,599	$1,365	$19,234
Boys Republic High	Public	9-12	1907 Boys Republic Dr.	Chino Hills	91710	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%)								(n/a)					0.0											$49,622	$1,461	$48,161
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%)	93.3	128^th of 2135 public high schools	94.0%		94.2	116^th of 2162 public high schools	94.6%	12			60.8		60.4				80.4	80.4				61.9	61.9	$17,102	$549	$16,553

Frequently Asked Questions about Diamond Ranch High

Is Diamond Ranch High a good school?

Diamond Ranch High ranks 780^th of 2135 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.

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

What district is Diamond Ranch High in?

Pomona Unified

How many students attend Diamond Ranch High?

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

Rate Diamond Ranch High!

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Latest California data All new data »

2024–25 school spending data (updated)NewNov 2, 2026

2013–14 through 2024–25 immunization rates (updated)Oct 19, 2026

2025–26 attendance data, dropout rates & graduation ratesOct 15, 2026

2025–26 CAST, CSA Spanish & Smarter Balanced Assessments scoresOct 15, 2026

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.