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Colony High

Q: Is Colony High a good school?

Colony High ranks 944 th of 2137 California high schools. SchoolDigger rates this school 3 stars out of 5.

Public Grades 9-12

944^th

SchoolDigger Rank ?

of 2,137 California High Schools

Better than 56% of California high schools

Summary

Colony High is a public high school serving grades 9–12 and 2,109 students in Ontario, California, in the Chaffey Joint Union High School District. Its clearest academic strength is English language arts (ELA), but the most important concern is math: 25% of students are proficient, well below the state and district rates.

ELA results are above the state rate but below the district’s: 56% of Colony students are proficient, compared with 49% statewide and 64% in the district. Colony is close to the average for six nearby comprehensive high schools, 55%. Math is a sharper weakness: Colony’s 25% is 14 percentage points below the state, 12 below the district, and 4 below the nearby-school average. Science proficiency is 29%, also below the state’s 36%, the district’s 39%, and the nearby-school average of 31%. Graduation and attendance offer a positive counterpoint: 94% of students graduate, above the district’s 93% and state’s 88%; chronic absenteeism is 18%, just below the state rate and 4 points below the district’s.

Over time, science has improved by 9 percentage points since 2022–23, while math has stayed essentially unchanged and ELA has fallen by 10 points. SchoolDigger gives Colony 3 stars and places it at the 56th statewide percentile for 2025–26, near Chaffey High (57th), Ontario High (58th), and Chino High (59th). Its 25.9 student–teacher ratio is the highest reported among nearby schools. In 2024–25, 70% of students were free/reduced lunch eligible. SchoolDigger’s group-specific rankings vary: its ranking for Asian students was at the 30th percentile, well below the school’s overall 56th, while its ranking for homeless students was at the 71st percentile, up from 51st the prior year.

2,109

Students ?

25.9

Student/teacher ratio ?

$26,742

Per pupil spending ?

69.7%

Free/reduced lunch eligible (2024-25) ?

All students in California receive free school meals.

3850 East Riverside Dr.
Ontario, CA 91761-2603

(909) 930-2929

District: Chaffey Joint Union High

Feeder schools for Colony High:

Elementary:	Creek View Elementary
	Del Norte Elementary
	Mountain View Elementary
	Ontario Center
	More...
	Perdew Elementary
	Ranch View Elementary
Middle:	Grace Yokley Junior High
	Rancho Cucamonga Middle

Racial breakdown:

Hispanic:

66.4%

African American:

12.8%

Asian:

9.0%

See top rated California high schools

Compare Colony High to nearby high schools!

At a glance

▬ Ranking trend: Holding steady — 57th percentile in 2016 → 56th in 2026

Strengths

✓94% graduate in 4 years — above the California average (88%)

✓Above the California median (56th percentile)

Worth a look

!Test scores below the California average (35% vs 42% meeting standards)

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

!Mathematics scores 14 pts below the California average

Students meeting standards (2025-2026) ?

This school35%

District avg45%

California avg42%

944^th of 2,137

California public high schools ?

Top 44%▼ down 1 pts since 2016

See the entire ranking list of California High Schools →

★★★★★

SchoolDigger rating ?

9^th of 10High Schools in the Chaffey Joint Union High

243^rd of 968Chaffey Joint Union High 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	54.2	944 of 2137	55.8%	★★★☆☆
2025	55.3	929 of 2162	57.0%	★★★☆☆
2024	61.1	738 of 2159	65.8%	★★★☆☆
2023	63.4	691 of 2170	68.2%	★★★☆☆
2022	61.4	685 of 2123	67.7%	★★★☆☆
2021	72.1	324 of 1290	74.9%	★★★★☆
2019	63.2	669 of 2133	68.6%	★★★☆☆
2018	73.9	517 of 2017	74.4%	★★★★☆
2017	57.8	843 of 2021	58.3%	★★★☆☆
2016	56.1	877 of 2039	57.0%	★★★☆☆
2015	58.6	777 of 1994	61.0%	★★★☆☆
2013	45.2	921 of 2426	62.0%	★★★☆☆
2012	56.3	644 of 2354	72.6%	★★★★☆
2011	56.5	628 of 2367	73.5%	★★★★☆
2010	50.8	741 of 2281	67.5%	★★★☆☆
2009	53.3	655 of 2238	70.7%	★★★★☆
2008	46.6	749 of 2117	64.6%	★★★☆☆
2007	49.1	670 of 2063	67.5%	★★★☆☆
2006	42.2	789 of 1968	59.9%	★★★☆☆
2005	43.3	731 of 1901	61.5%	★★★☆☆
2004	43.6	616 of 1653	62.7%	★★★☆☆

African American

Year	Avg score	Statewide rank	California percentile	Rating
2026	31.4	333 of 491	32.2%	★★☆☆☆
2025	44.2	258 of 523	50.7%	★★★☆☆
2024	49.2	215 of 517	58.4%	★★★☆☆
2023	62.4	165 of 521	68.3%	★★★☆☆
2022	60.4	157 of 522	69.9%	★★★★☆
2019	60.0	185 of 592	68.8%	★★★☆☆
2018	55.5	222 of 582	61.9%	★★★☆☆

Asian

Year	Avg score	Statewide rank	California percentile	Rating
2026	37.2	401 of 575	30.3%	★★☆☆☆
2025	20.4	475 of 585	18.8%	★☆☆☆☆
2024	28.8	428 of 573	25.3%	★☆☆☆☆
2023	36.9	403 of 591	31.8%	★★☆☆☆
2022	56.9	280 of 581	51.8%	★★★☆☆
2019	56.0	292 of 582	49.8%	★★★☆☆
2018	58.5	285 of 581	50.9%	★★★☆☆

Disabled

Year	Avg score	Statewide rank	California percentile	Rating
2022	43.8	495 of 1161	57.4%	★★★☆☆
2021	15.9	551 of 555	0.7%	☆☆☆☆☆
2019	30.5	759 of 1117	32.1%	★★☆☆☆
2018	34.9	613 of 1052	41.7%	★★☆☆☆

English Language Learner

Year	Avg score	Statewide rank	California percentile	Rating
2024	36.2	680 of 1085	37.3%	★★☆☆☆
2023	65.2	166 of 1064	84.4%	★★★★☆
2022	44.1	424 of 1044	59.4%	★★★☆☆
2019	47.2	326 of 941	65.4%	★★★☆☆
2018	43.0	393 of 938	58.1%	★★★☆☆

Female

Year	Avg score	Statewide rank	California percentile	Rating
2026	44.9	1024 of 1865	45.1%	★★☆☆☆
2025	51.3	885 of 1906	53.6%	★★★☆☆
2024	54.0	797 of 1915	58.4%	★★★☆☆
2023	62.8	623 of 1915	67.5%	★★★☆☆
2022	60.9	601 of 1858	67.7%	★★★☆☆
2021	75.2	243 of 1054	76.9%	★★★★☆
2019	61.2	619 of 1833	66.2%	★★★☆☆
2018	72.9	484 of 1760	72.5%	★★★★☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2026	59.0	712 of 1880	62.1%	★★★☆☆
2025	66.3	573 of 1900	69.8%	★★★☆☆
2024	71.1	458 of 1902	75.9%	★★★★☆
2023	71.7	446 of 1917	76.7%	★★★★☆
2022	68.7	459 of 1861	75.3%	★★★★☆
2019	68.7	461 of 1814	74.6%	★★★★☆
2018	83.2	261 of 1742	85.0%	★★★★☆

Homeless

Year	Avg score	Statewide rank	California percentile	Rating
2026	64.4	103 of 358	71.2%	★★★★☆
2025	47.0	200 of 410	51.2%	★★★☆☆
2024	68.7	76 of 328	76.8%	★★★★☆
2023	70.8	62 of 299	79.3%	★★★★☆
2022	62.3	89 of 290	69.3%	★★★☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2026	55.6	841 of 1999	57.9%	★★★☆☆
2025	59.5	761 of 2013	62.2%	★★★☆☆
2024	64.6	607 of 2026	70.0%	★★★★☆
2023	71.2	456 of 2030	77.5%	★★★★☆
2022	66.7	507 of 1943	73.9%	★★★★☆
2021	78.1	203 of 1126	82.0%	★★★★☆
2019	67.2	514 of 1937	73.5%	★★★★☆
2018	76.7	372 of 1862	80.0%	★★★★☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2026	56.1	799 of 1932	58.6%	★★★☆☆
2025	51.6	885 of 1942	54.4%	★★★☆☆
2024	61.9	650 of 1948	66.6%	★★★☆☆
2023	59.4	684 of 1963	65.2%	★★★☆☆
2022	57.6	690 of 1916	64.0%	★★★☆☆
2021	57.9	427 of 1122	61.9%	★★★☆☆
2019	58.9	680 of 1880	63.8%	★★★☆☆
2018	70.0	531 of 1834	71.0%	★★★★☆

Multi-racial

Year	Avg score	Statewide rank	California percentile	Rating
2026	33.2	408 of 588	30.6%	★★☆☆☆
2025	9.5	530 of 577	8.1%	☆☆☆☆☆
2024	27.1	429 of 574	25.3%	★☆☆☆☆
2023	39.0	342 of 541	36.8%	★★☆☆☆
2022	31.2	381 of 515	26.0%	★☆☆☆☆
2019	18.8	348 of 422	17.5%	★☆☆☆☆

Special Education

Year	Avg score	Statewide rank	California percentile	Rating
2026	30.8	843 of 1235	31.7%	★★☆☆☆
2025	30.3	872 of 1252	30.4%	★★☆☆☆
2024	32.5	774 of 1216	36.3%	★★☆☆☆
2023	47.0	489 of 1197	59.1%	★★★☆☆

White

Year	Avg score	Statewide rank	California percentile	Rating
2026	59.8	470 of 1132	58.5%	★★★☆☆
2025	38.8	749 of 1155	35.2%	★★☆☆☆
2024	40.1	735 of 1173	37.3%	★★☆☆☆
2023	44.7	675 of 1193	43.4%	★★☆☆☆
2022	51.4	575 of 1204	52.2%	★★★☆☆
2019	70.2	335 of 1222	72.6%	★★★★☆
2018	68.1	401 of 1173	65.8%	★★★☆☆

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 (2026)71st percentile+15 vs school

Hispanic (2026)62nd percentile+6 vs school

Male (2026)59th percentile+3 vs school

White (2026)58th percentile+3 vs school

Low Socio Economic Status (2026)58th percentile~ school

Disabled (2022)57th percentile-10 vs school

Female (2026)45th percentile-11 vs school

English Language Learner (2024)37th percentile-28 vs school

African American (2026)32nd percentile-24 vs school

Special Education (2026)32nd percentile-24 vs school

Multi-racial (2026)31st percentile-25 vs school

Asian (2026)30th percentile-26 vs school

By subject vs California (2025-2026) ?

English Language Arts/Literacy56%+6 vs state

Science29%-7 vs state

Mathematics25%-14 vs state

★

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Schools Near Colony 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 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
Colony High	Public	9-12	3850 East Riverside Dr.	Ontario	91761	San Bernardino County	Chaffey Joint Union High	No	(n/a)	No	(n/a)	(909) 930-2929	2,109	81	25.9	69.7%	153 (7.3%)	270 (12.8%)	1,400 (66.4%)	190 (9.0%)	7 (0.3%)	21 (1.0%)	66 (3.1%)	54.2	944^th of 2137 public high schools	55.8%		55.3	929^th of 2162 public high schools	57.0%	15	33.3	24.0	28.9	55.6	55.6	24.8	24.8	$26,742	$25,796	$946
Jurupa Valley High	Public	9-12	10551 Bellegrave Ave.	Jurupa Valley	91752	Riverside County	Jurupa Unified	No	(n/a)	No	(n/a)	(951) 360-2600	1,693	71	23.7	81.6%	90 (5.3%)	19 (1.1%)	1,518 (89.7%)	34 (2.0%)	2 (0.1%)	2 (0.1%)	28 (1.7%)	30.5	1471^st of 2137 public high schools	31.2%		38.3	1304^th of 2162 public high schools	39.7%	167	15.8	13.3	15.7	41.5	41.5	15.4	15.4	$23,946	$23,104	$842
Eleanor Roosevelt High	Public	9-12	7447 Scholar Way	Eastvale	92880	Riverside County	Corona-Norco Unified	No	(n/a)	No	(n/a)	(951) 738-2100	4,353	170	25.6	66.2%	569 (13.1%)	406 (9.3%)	1,798 (41.3%)	1,414 (32.5%)	15 (0.3%)	13 (0.3%)	135 (3.1%)	89.7	209^th of 2137 public high schools	90.2%		85.9	287^th of 2162 public high schools	86.7%	78	59.1	24.4	57.6	74.5	74.5	55.8	55.8	$20,567	$19,908	$659
Baldy View Regional Occupational Program	Public	9-12	1501 South Bon View Ave.	Ontario	91761	San Bernardino County	Baldy View Regional Occupational Program	No	(n/a)	(n/a)	(n/a)	(909) 947-3400	0			—	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)
Henry J. Kaiser High	Public	9-12	11155 Almond Ave.	Fontana	92337	San Bernardino County	Fontana Unified	No	(n/a)	No	(n/a)	(909) 357-5900	1,660	86	19.3	86.1%	58 (3.5%)	77 (4.6%)	1,459 (87.9%)	53 (3.2%)	1 (0.1%)	1 (0.1%)	10 (0.6%)	45.2	1136^th of 2137 public high schools	46.8%		58.9	851^st of 2162 public high schools	60.6%	285	22.9	25.0	23.0	45.7	45.7	28.7	28.7	$49,748	$43,280	$6,468
Valley View High (Continuation)	Public	9-12	1801 East Sixth St.	Ontario	91764	San Bernardino County	Chaffey Joint Union High	No	(n/a)	No	(n/a)	(909) 985-0966	370	25	14.8	84.9%	33 (8.9%)	28 (7.6%)	289 (78.1%)	7 (1.9%)	3 (0.8%)	1 (0.3%)	8 (2.2%)	14.1	1777^th of 2137 public high schools	16.8%		13.5	1856^th of 2162 public high schools	14.2%	79	7.1	7.4	7.3	9.8	9.8	8.8	8.8	$46,265	$45,128	$1,137
Chaffey District Online High	Public, Virtual	9-12	1802 East 7th St.	Ontario	91764	San Bernardino County	Chaffey Joint Union High	No	(n/a)	Yes	(n/a)	(909) 985-0966	93	5	18.3	62.4%	22 (23.7%)	4 (4.3%)	55 (59.1%)	6 (6.5%)	0 (0.0%)	0 (0.0%)	6 (6.5%)	95.4	79^th of 2137 public high schools	96.3%		86	286^th of 2162 public high schools	86.8%	207	67.5	65.0	66.7	77.8	77.8	77.1	77.1	$30,020	$29,930	$90
Chaffey Community Day	Public	9-12	1802 East Seventh St.	Ontario	91764	San Bernardino County	Chaffey Joint Union High	No	(n/a)	No	(n/a)	(909) 985-0966	20	2	9.0	85.0%	0 (0.0%)	4 (20.0%)	16 (80.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)
Ontario High	Public	9-12	901 West Francis St.	Ontario	91762	San Bernardino County	Chaffey Joint Union High	No	(n/a)	No	(n/a)	(909) 988-7411	1,994	91	21.8	86.7%	47 (2.4%)	54 (2.7%)	1,773 (88.9%)	66 (3.3%)	16 (0.8%)	7 (0.4%)	30 (1.5%)	56.3	894^th of 2137 public high schools	58.2%		62.9	744^th of 2162 public high schools	65.6%	150	31.8	26.9	29.3	54.4	54.4	28.6	28.6	$29,082	$27,814	$1,268
Chaffey High	Public	9-12	1245 North Euclid Ave.	Ontario	91762	San Bernardino County	Chaffey Joint Union High	No	(n/a)	No	(n/a)	(909) 988-5560	3,127	134	23.3	81.5%	88 (2.8%)	99 (3.2%)	2,777 (88.8%)	80 (2.6%)	18 (0.6%)	8 (0.3%)	55 (1.8%)	55	916^th of 2137 public high schools	57.1%		55.9	910^th of 2162 public high schools	57.9%	6	33.7	30.1	31.9	53.2	53.2	22.1	22.1	$26,501	$25,450	$1,051

Frequently Asked Questions about Colony High

Is Colony High a good school?

Colony High ranks 944^th of 2137 California high schools. SchoolDigger rates this school 3 stars out of 5.

What schools feed into Colony High?

Colony High is fed by the following schools:

Elementary : Creek View Elementary
Elementary : Del Norte Elementary
Elementary : Mountain View Elementary
Elementary : Ontario Center
Elementary : Perdew Elementary
Elementary : Ranch View Elementary
Middle : Grace Yokley Junior High
Middle : Rancho Cucamonga Middle

What is the racial makeup of Colony High?

Students at Colony High are 66% Hispanic, 13% African American, 9% Asian, 7% White, 3% Two or more races.

How many students attend Colony High?

In the 2024-25 school year, 2,109 students attended Colony High.

What district is Colony High in?

Chaffey Joint Union High

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Latest California data All new data »

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

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

2024–25 school spending dataJul 1, 2026

2024–25 attendance dataMar 13, 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.