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Arroyo Seco Junior High

Q: Is Arroyo Seco Junior High a good school?

Arroyo Seco Junior High ranks 337 th of 2761 California middle schools. SchoolDigger rates this school 4 stars out of 5.

Public Grades 7-8

337^th

SchoolDigger Rank ?

of 2,761 California Middle Schools

Better than 88% of California middle schools

Summary

Arroyo Seco Junior High is a large, high-performing public school for grades 7-8 in Valencia, serving 1,239 students within the William S. Hart Union High district, and it consistently ranks in the top 15% of all California middle schools.

The school stands out for its exceptional support for all student groups, with Hispanic, African American, English Learner, and homeless students historically achieving academic rankings in the 90th percentile or higher statewide. It also operates very efficiently, spending significantly less per student than nearby schools like La Mesa Junior High and Placerita Junior High while maintaining equal or better academic results, even with slightly larger class sizes.

Compared to its district peers, Arroyo Seco's strong 88th percentile ranking places it solidly in the middle of a performance range that includes higher-ranked Rio Norte Junior High (92nd percentile) and lower-ranked Sierra Vista Junior High (66th percentile). The school has shown remarkable resilience, keeping chronic absenteeism well below state averages and maintaining its high academic standing throughout the pandemic years.

1,239

Students ?

24.3

Student/teacher ratio ?

$15,276

Per pupil spending ?

17.2%

Free/discounted lunch ?

27171 North Vista Delgado Dr.
Valencia, CA 91354-2244

(661) 296-0991

District: William S. Hart Union High

Students who attend Arroyo Seco Junior High usually attend:

High:	Academy of the Canyons
	Saugus High

Racial breakdown:

Hispanic:

38.2%

White:

38.1%

Asian:

13.2%

See top rated California middle schools

Compare Arroyo Seco Junior High to nearby middle schools!

At a glance

▬ Ranking trend: Holding steady — 84th percentile in 2013 → 88th in 2025

Strengths

✓Test scores above the California average (60% vs 41% meeting standards)

✓Ranks in the top 12% of California middle schools

Worth a look

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

!Large classes — about 24 students per teacher

Students meeting standards (2024-2025) ?

This school60%

District avg56%

California avg41%

337^th of 2,761

California public middle schools ?

Top 12%▲ up 3 pts since 2015

See the entire ranking list of California Middle Schools →

★★★★★

SchoolDigger rating ?

3^rd of 6Middle Schools in the William S. Hart Union High

235^th of 1,543William S. Hart 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
2025	86.9	337 of 2761	87.8%	★★★★☆
2024	85.4	378 of 2783	86.4%	★★★★☆
2023	85.6	358 of 2781	87.1%	★★★★☆
2022	86.6	347 of 2740	87.3%	★★★★☆
2019	86.6	339 of 2715	87.5%	★★★★☆
2018	84.4	357 of 2480	85.6%	★★★★☆
2017	86.9	314 of 2508	87.5%	★★★★☆
2016	87.4	287 of 2497	88.5%	★★★★☆
2015	82.7	376 of 2477	84.8%	★★★★☆
2013	78.1	370 of 2379	84.4%	★★★★☆
2012	72.4	512 of 2259	77.3%	★★★★☆
2011	63.3	731 of 2236	67.3%	★★★☆☆
2010	76.3	395 of 2179	81.9%	★★★★☆
2009	82.7	237 of 2063	88.5%	★★★★☆
2008	84.7	204 of 2005	89.8%	★★★★☆
2007	86.1	194 of 1999	90.3%	★★★★★
2006	85.5	194 of 1804	89.2%	★★★★☆
2005	86.1	176 of 1777	90.1%	★★★★★
2004	81.7	264 of 1769	85.1%	★★★★☆

African American

Year	Avg score	Statewide rank	California percentile	Rating
2025	82.4	68 of 609	88.8%	★★★★☆
2024	97.9	11 of 627	98.2%	★★★★★
2023	85.7	54 of 613	91.2%	★★★★★
2022	93.7	27 of 637	95.8%	★★★★★
2019	96.1	14 of 643	97.8%	★★★★★
2018	97.8	12 of 600	98.0%	★★★★★

Asian

Year	Avg score	Statewide rank	California percentile	Rating
2025	73.4	212 of 739	71.3%	★★★★☆
2024	75.0	182 of 743	75.5%	★★★★☆
2023	74.2	177 of 715	75.2%	★★★★☆
2022	73.4	199 of 733	72.9%	★★★★☆
2019	78.5	133 of 745	82.1%	★★★★☆
2018	82.0	81 of 700	88.4%	★★★★☆

Disabled

Year	Avg score	Statewide rank	California percentile	Rating
2022	83.8	142 of 1531	90.7%	★★★★★
2019	74.9	233 of 1491	84.4%	★★★★☆
2018	77.5	191 of 1369	86.0%	★★★★☆

English Language Learner

Year	Avg score	Statewide rank	California percentile	Rating
2022	95.3	29 of 1540	98.1%	★★★★★
2019	60.3	296 of 1442	79.5%	★★★★☆
2018	76.7	162 of 1364	88.1%	★★★★☆

Female

Year	Avg score	Statewide rank	California percentile	Rating
2025	82.4	391 of 2533	84.6%	★★★★☆
2024	84.2	369 of 2551	85.5%	★★★★☆
2023	84.5	350 of 2531	86.2%	★★★★☆
2022	86.3	314 of 2509	87.5%	★★★★☆
2019	84.7	328 of 2380	86.2%	★★★★☆
2018	82.0	365 of 2262	83.9%	★★★★☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2025	88.6	174 of 2395	92.7%	★★★★★
2024	85.7	204 of 2388	91.5%	★★★★★
2023	87.7	180 of 2374	92.4%	★★★★★
2022	90.7	129 of 2359	94.5%	★★★★★
2019	87.6	172 of 2213	92.2%	★★★★★
2018	85.3	193 of 2072	90.7%	★★★★★

Homeless

Year	Avg score	Statewide rank	California percentile	Rating
2023	98.9	5 of 320	98.4%	★★★★★

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2025	82.5	288 of 2542	88.7%	★★★★☆
2024	92.0	154 of 2579	94.0%	★★★★★
2023	82.5	286 of 2531	88.7%	★★★★☆
2022	77.4	346 of 2458	85.9%	★★★★☆
2019	82.4	255 of 2369	89.2%	★★★★☆
2018	74.7	386 of 2230	82.7%	★★★★☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2025	88.2	290 of 2534	88.6%	★★★★☆
2024	84.2	354 of 2552	86.1%	★★★★☆
2023	84.8	346 of 2538	86.4%	★★★★☆
2022	85.6	342 of 2527	86.5%	★★★★☆
2019	86.7	307 of 2407	87.2%	★★★★☆
2018	84.9	327 of 2273	85.6%	★★★★☆

Multi-racial

Year	Avg score	Statewide rank	California percentile	Rating
2025	74.7	174 of 726	76.0%	★★★★☆
2024	70.9	198 of 701	71.8%	★★★★☆
2023	76.4	145 of 677	78.6%	★★★★☆
2019	67.0	192 of 554	65.3%	★★★☆☆

Special Education

Year	Avg score	Statewide rank	California percentile	Rating
2025	71.3	258 of 1566	83.5%	★★★★☆
2024	81.2	166 of 1552	89.3%	★★★★☆
2023	77.3	193 of 1531	87.4%	★★★★☆

White

Year	Avg score	Statewide rank	California percentile	Rating
2025	69.8	433 of 1520	71.5%	★★★★☆
2024	71.2	404 of 1537	73.7%	★★★★☆
2023	72.1	379 of 1543	75.4%	★★★★☆
2022	73.4	359 of 1555	76.9%	★★★★☆
2019	75.9	341 of 1602	78.7%	★★★★☆
2018	71.8	420 of 1496	71.9%	★★★★☆

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 (2023)98th percentile+11 vs school

English Language Learner (2022)98th percentile+11 vs school

Hispanic (2025)93rd percentile+5 vs school

Disabled (2022)91st percentile+3 vs school

African American (2025)89th percentile~ school

Low Socio Economic Status (2025)89th percentile~ school

Male (2025)89th percentile~ school

Female (2025)85th percentile-3 vs school

Special Education (2025)84th percentile-4 vs school

Multi-racial (2025)76th percentile-12 vs school

White (2025)72nd percentile-16 vs school

Asian (2025)71st percentile-16 vs school

By subject vs California (2024-2025) ?

English Language Arts/Literacy69%+20 vs state

Mathematics55%+18 vs state

Science52%+20 vs state

★

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Schools Near Arroyo Seco Junior 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 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 All Grades	Smarter Balanced Assessments Mathematics 6th Grade	Smarter Balanced Assessments Mathematics 7th Grade	Smarter Balanced Assessments Mathematics 8th Grade	Smarter Balanced Assessments Mathematics All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Arroyo Seco Junior High	Public	7-8	27171 North Vista Delgado Dr.	Valencia	91354	Los Angeles County	William S. Hart Union High	No	(n/a)	No	(n/a)	(661) 296-0991	1,239	51	24.3	17.2%	472 (38.1%)	37 (3.0%)	473 (38.2%)	164 (13.2%)	4 (0.3%)	0 (0.0%)	89 (7.2%)	86.9	337^th of 2761 public middle schools	87.8%		85.4	378^th of 2783 public middle schools	86.4%	41	52.4	52.4		68.7	68.5	68.6		52.7	57.7	55.1	$15,276	$870	$14,406
Rio Norte Junior High	Public	7-8	28771 Rio Norte Dr.	Santa Clarita	91354	Los Angeles County	William S. Hart Union High	No	(n/a)	No	(n/a)	(661) 295-3700	1,138	47	24.0	17.0%	436 (38.3%)	54 (4.7%)	282 (24.8%)	294 (25.8%)	0 (0.0%)	2 (0.2%)	70 (6.2%)	92	227^th of 2761 public middle schools	91.8%		90.1	276^th of 2783 public middle schools	90.1%	49	52.7	52.7		76.7	72.1	74.5		64.6	61.6	63.2	$16,742	$1,862	$14,880
Placerita Junior High	Public	7-8	25015 North Newhall Ave.	Newhall	91321	Los Angeles County	William S. Hart Union High	No	(n/a)	No	(n/a)	(661) 259-1551	940	44	21.3	53.6%	260 (27.7%)	10 (1.1%)	610 (64.9%)	36 (3.8%)	0 (0.0%)	0 (0.0%)	24 (2.6%)	78.1	514^th of 2761 public middle schools	81.4%		80	478^th of 2783 public middle schools	82.8%	36	46.6	46.6		64.1	60.0	62.0		52.0	43.0	47.4	$17,872	$958	$16,914
La Mesa Junior High	Public	7-8	26623 May Way	Santa Clarita	91351	Los Angeles County	William S. Hart Union High	No	(n/a)	No	(n/a)	(661) 250-0022	1,017	50	20.2	47.8%	180 (17.7%)	79 (7.8%)	578 (56.8%)	133 (13.1%)	3 (0.3%)	2 (0.2%)	42 (4.1%)	67.3	735^th of 2761 public middle schools	73.4%		56.8	965^th of 2783 public middle schools	65.3%	230	31.2	31.2		63.6	55.4	59.3		50.8	35.6	42.9	$18,315	$1,945	$16,370
Sierra Vista Junior High	Public	7-8	19425 West Stillmore St.	Canyon Country	91351	Los Angeles County	William S. Hart Union High	No	(n/a)	No	(n/a)	(661) 252-3113	946	46	20.4	43.4%	211 (22.3%)	23 (2.4%)	651 (68.8%)	35 (3.7%)	1 (0.1%)	2 (0.2%)	23 (2.4%)	59	930^th of 2761 public middle schools	66.3%		59.7	896^th of 2783 public middle schools	67.8%	34	36.1	36.1		51.0	55.2	53.0		34.3	34.6	34.4	$17,813	$1,078	$16,735
Rancho Pico Junior High	Public	7-8	26250 West Valencia Blvd.	Stevenson Ranch	91381	Los Angeles County	William S. Hart Union High	No	(n/a)	No	(n/a)	(661) 284-3260	842	36	23.5	13.4%	289 (34.3%)	37 (4.4%)	194 (23.0%)	252 (29.9%)	1 (0.1%)	1 (0.1%)	68 (8.1%)	95.5	134^th of 2761 public middle schools	95.1%		95	154^th of 2783 public middle schools	94.5%	20	61.5	61.5		82.1	80.8	81.4		70.7	62.4	66.4	$16,697	$1,224	$15,473
Castaic Middle	Public	7-8	28900 Hillcrest Pkwy.	Castaic	91384	Los Angeles County	Castaic Union	No	(n/a)	No	(n/a)	(661) 257-4550	451	20	22.7	50.8%	157 (34.8%)	12 (2.7%)	216 (47.9%)	29 (6.4%)	0 (0.0%)	0 (0.0%)	36 (8.0%)	71.2	645^th of 2761 public middle schools	76.6%		64.3	797^th of 2783 public middle schools	71.4%	152	42.7	42.7		59.4	62.3	60.8		40.6	39.3	40.0	$17,609	$421	$17,188
Olive Vista Middle	Public	6-8	14600 Tyler St.	Sylmar	91342	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 833-3900	897	49	18.2	88.7%	15 (1.7%)	11 (1.2%)	856 (95.4%)	8 (0.9%)	0 (0.0%)	0 (0.0%)	7 (0.8%)	39.5	1501^st of 2761 public middle schools	45.6%		32.6	1721^st of 2783 public middle schools	38.2%	220	24.4	24.4	39.3	43.2	39.7	40.8	21.6	32.9	28.3	27.9	$23,086	$3,921	$19,165
Robert Frost Middle	Public	6-8	12314 Bradford Pl.	Granada Hills	91344	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 832-6900	1,505	63	23.8	54.1%	498 (33.1%)	49 (3.3%)	749 (49.8%)	138 (9.2%)	1 (0.1%)	0 (0.0%)	70 (4.7%)	91.7	232^nd of 2761 public middle schools	91.6%		91	257^th of 2783 public middle schools	90.8%	25	55.0	55.0	74.6	78.2	69.5	74.2	65.4	60.7	58.9	61.8	$17,892	$2,895	$14,997
PUC Nueva Esperanza Charter Academy	Public, Charter	6-8	1218 North Fourth St.	San Fernando	91340	Los Angeles County	PUC Nueva Esperanza Charter Academy District	Yes	(n/a)	No	(n/a)	(818) 256-1951	351	16	21.9	90.0%	6 (1.7%)	1 (0.3%)	340 (96.9%)	2 (0.6%)	2 (0.6%)	0 (0.0%)	0 (0.0%)	34.9	1648^th of 2761 public middle schools	40.3%		31.9	1734^th of 2783 public middle schools	37.7%	86	18.0	18.0	40.3	46.6	37.6	41.5	25.2	28.0	17.1	23.5	$20,017	$17,245	$2,772

Frequently Asked Questions about Arroyo Seco Junior High

How many students attend Arroyo Seco Junior High?

In the 2024-25 school year, 1,239 students attended Arroyo Seco Junior High.

Is Arroyo Seco Junior High a good school?

Arroyo Seco Junior High ranks 337^th of 2761 California middle schools. SchoolDigger rates this school 4 stars out of 5.

What is the racial makeup of Arroyo Seco Junior High?

Students at Arroyo Seco Junior High are 38% Hispanic, 38% White, 13% Asian, 7% Two or more races, 3% African American.

What district is Arroyo Seco Junior High in?

William S. Hart Union High

What high school do graduates of Arroyo Seco Junior High attend?

Students who attend Arroyo Seco Junior High usually go on to attend Academy of the Canyons

Rate Arroyo Seco Junior High!

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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.