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River Islands High

Q: Is River Islands High a good school?

River Islands High ranks 802 nd of 2162 California high schools. SchoolDigger rates this school 3 stars out of 5.

Public, Charter Grades 9-12

802^nd

SchoolDigger Rank ?

of 2,162 California High Schools

Better than 63% of California high schools

Summary

River Islands High is a public high school serving 512 students in grades 9-12 in Lathrop, CA, operating within the River Islands High District and ranking in the 63rd percentile among California high schools.

The school has clear strengths, including outperforming the state average in English Language Arts and maintaining a chronic absenteeism rate significantly better than the state and most nearby schools like East Union High and Lathrop High. It achieves this while spending notably less per student than comparable schools. However, it faces challenges in mathematics and, particularly, science, where its proficiency is below the state average and lags behind nearby schools such as Sierra High.

When compared to its closest neighbor, Lathrop High, River Islands High serves a student population with less economic disadvantage but does not see proportionally stronger academic results, especially in science. The school shows varied effectiveness with different student groups and its district support is stronger than those of many surrounding schools in Manteca Unified or Tracy Joint Unified. The strong attendance culture provides a solid foundation for potential academic growth.

512

Students ?

18.5

Student/teacher ratio ?

$25,997

Per pupil spending ?

37.9%

Free/discounted lunch ?

16601 Riptide Way
Lathrop, CA 95330

(209) 717-6715

District: River Islands High District

Racial breakdown:

Asian:

47.9%

Hispanic:

29.9%

African American:

10.9%

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At a glance

Strengths

✓Above the California median (63rd percentile)

Worth a look

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

Students meeting standards (2024-2025) ?

This school41%

California avg41%

802^nd of 2,162

California public high schools ?

Top 37%

See the entire ranking list of California High Schools →

★★★★★

SchoolDigger rating ?

503^rd of 1,543River Islands High District among California districts

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)

Male (2025)65th percentile~ school

African American (2025)62nd percentile~ school

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

Special Education (2025)59th percentile-4 vs school

Female (2025)59th percentile-4 vs school

White (2025)41st percentile-22 vs school

Hispanic (2025)38th percentile-25 vs school

Asian (2025)18th percentile-44 vs school

By subject vs California (2024-2025) ?

English Language Arts/Literacy53%+4 vs state

Mathematics32%-5 vs state

Science24%-9 vs state

★

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Schools Near River Islands 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 (2025)				Ranking (2024)				CAST Science (2025)			Smarter Balanced Assessments English Language Arts/Literacy (2025)		Smarter Balanced Assessments Mathematics (2025)		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	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 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
River Islands High	Public, Charter	9-12	16601 Riptide Way	Lathrop	95330	San Joaquin County	River Islands High District	Yes	(n/a)	No	(n/a)	(209) 717-6715	512	28	18.5	37.9%	41 (8.0%)	56 (10.9%)	153 (29.9%)	245 (47.9%)	5 (1.0%)	7 (1.4%)	5 (1.0%)	60.8	802^nd of 2162 public high schools	62.9%					(n/a)	23.5		23.5	52.7	52.7	31.8	31.8	$25,997	$25,630	$367
Lathrop High	Public	9-12	647 Spartan Way	Lathrop	95330	San Joaquin County	Manteca Unified	No	(n/a)	No	(n/a)	(209) 938-6350	1,486	69	21.5	62.2%	132 (8.9%)	98 (6.6%)	822 (55.3%)	356 (24.0%)	5 (0.3%)	20 (1.3%)	53 (3.6%)	59	849^th of 2162 public high schools	60.7%		68.8	587^th of 2159 public high schools	72.8%	262	33.1		32.7	62.3	62.3	20.6	20.6	$21,701	$20,908	$793
Millennium Charter	Public, Charter	9-12	51 East Beverly Pl.	Tracy	95376	San Joaquin County	Millennium Charter District	Yes	(n/a)	No	(n/a)	(209) 290-0511	436	27	16.2	22.5%	79 (18.1%)	20 (4.6%)	242 (55.5%)	72 (16.5%)	0 (0.0%)	0 (0.0%)	23 (5.3%)	86.7	269^th of 2162 public high schools	87.6%		75.8	474^th of 2159 public high schools	78.0%	205	56.4		56.4	74.3	74.3	40.6	40.6
Tracy High	Public	9-12	315 East 11th St.	Tracy	95376	San Joaquin County	Tracy Joint Unified	No	(n/a)	No	(n/a)	(209) 830-3360	1,739	79	22.1	62.7%	357 (20.5%)	64 (3.7%)	959 (55.1%)	248 (14.3%)	9 (0.5%)	15 (0.9%)	81 (4.7%)	54.2	944^th of 2162 public high schools	56.3%		54.1	903^rd of 2159 public high schools	58.2%	41		23.0	23.0	54.5	54.5	20.3	20.3	$21,918	$21,526	$392
Sierra High	Public	9-12	1700 Thomas St.	Manteca	95337	San Joaquin County	Manteca Unified	No	(n/a)	No	(n/a)	(209) 858-7410	1,670	74	22.6	55.9%	315 (18.9%)	74 (4.4%)	735 (44.0%)	461 (27.6%)	2 (0.1%)	24 (1.4%)	59 (3.5%)	77.8	450^th of 2162 public high schools	79.2%		68.9	580^th of 2159 public high schools	73.1%	130	44.3		43.7	66.7	66.7	36.7	36.7	$19,783	$18,952	$831
New Vision High	Public	9-12	4726 McCuen Ave.	Stockton	95206	San Joaquin County	Manteca Unified	No	(n/a)	No	(n/a)	(209) 938-6225	105	9	12.1	74.3%	5 (4.8%)	13 (12.4%)	75 (71.4%)	5 (4.8%)	0 (0.0%)	2 (1.9%)	5 (4.8%)	12.4	1898^th of 2162 public high schools	12.2%		13.5	1873^rd of 2159 public high schools	13.2%	25	8.3		7.3	17.1	17.1	0.0	0.0	$41,733	$40,260	$1,473
East Union High	Public	9-12	1700 North Union Rd.	Manteca	95336	San Joaquin County	Manteca Unified	No	(n/a)	No	(n/a)	(209) 858-7270	1,524	78	19.4	62.4%	343 (22.5%)	33 (2.2%)	983 (64.5%)	108 (7.1%)	6 (0.4%)	7 (0.5%)	41 (2.7%)	42.8	1194^th of 2162 public high schools	44.8%		44.5	1136^th of 2159 public high schools	47.4%	58	21.3	18.2	21.2	51.0	51.0	16.9	16.9	$22,621	$21,790	$831
Merrill F. West High	Public	9-12	1775 West Lowell Ave.	Tracy	95376	San Joaquin County	Tracy Joint Unified	No	(n/a)	No	(n/a)	(209) 830-3370	1,920	90	21.4	75.8%	219 (11.4%)	89 (4.6%)	1,113 (58.0%)	391 (20.4%)	8 (0.4%)	27 (1.4%)	68 (3.5%)	58.5	861^st of 2162 public high schools	60.2%		51.8	964^th of 2159 public high schools	55.3%	103	29.3		29.1	61.3	61.3	24.5	24.5	$21,043	$20,510	$533
Duncan-Russell Community Day	Public	7-12	650 W. 10th St.	Tracy	95376	San Joaquin County	Tracy Joint Unified	No	(n/a)	No	(n/a)	(209) 830-3395	22	3	8.4	86.4%	4 (18.2%)	5 (22.7%)	12 (54.5%)	0 (0.0%)	0 (0.0%)	1 (4.5%)	0 (0.0%)								(n/a)								$94,175	$88,484	$5,691
George and Evelyn Stein Continuation	Public	9-12	650 West 10th St.	Tracy	95376	San Joaquin County	Tracy Joint Unified	No	(n/a)	No	(n/a)	(209) 830-3395	121	10	11.7	86.8%	19 (15.7%)	9 (7.4%)	77 (63.6%)	7 (5.8%)	1 (0.8%)	1 (0.8%)	6 (5.0%)	11.2	1955^th of 2162 public high schools	9.6%		10.9	2015^th of 2159 public high schools	6.7%	60		3.5	3.5	8.0	8.0	2.0	2.0	$53,715	$51,890	$1,825

Frequently Asked Questions about River Islands High

What is the racial makeup of River Islands High?

Students at River Islands High are 48% Asian, 30% Hispanic, 11% African American, 8% White, 1% Pacific Islander.

How many students attend River Islands High?

In the 2024-25 school year, 512 students attended River Islands High.

What district is River Islands High in?

River Islands High District

Is River Islands High a good school?

River Islands High ranks 802^nd of 2162 California high schools. SchoolDigger rates this school 3 stars out of 5.

Rate River Islands High!

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Schools in Lathrop, CA

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Latest California data All new data »

2024–25 school spending dataJul 1, 2026

2024–25 attendance dataMar 13, 2026

2024–25 CSA Spanish test scoresDec 22, 2025

2024–25 dropout rates & graduation ratesNov 14, 2025

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.