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Isleton Elementary

Q: Is Isleton Elementary a good school?

Isleton Elementary ranks 1576 th of 5817 California elementary schools. SchoolDigger rates this school 4 stars out of 5.

Public Grades K-6

1576^th

SchoolDigger Rank ?

of 5,817 California Elementary Schools

Better than 73% of California elementary schools

Summary

Isleton Elementary serves 188 students in grades K–6 in Isleton, in California’s Delta region. Its clearest distinction is its strong achievement: in 2025–2026, it had the highest reported all-grade proficiency among nearby schools in ELA, math, and science, and scored above both its district and the state in all three subjects.

The school’s biggest advantage over nearby schools is in science: 60% were proficient, 27 points above the next-highest reported nearby result at Summer Lake Elementary. In math, Isleton’s 53% was 22 points above Summer Lake’s 32%; in ELA, its 55% was 12 points above Knightsen Elementary’s 43%. Isleton also exceeded River Delta Joint Unified by 17 points in ELA, 32 in math, and 35 in science, and the state by 6, 15, and 24 points, respectively. Third grade is the clearest weakness: ELA was 8 points below the state and math was 15 points below. Scores rose above the state in both subjects in grades 4–6. Bates Elementary’s science score is state-suppressed, so it is not part of the nearby comparison.

Over time, math rose from 42% proficiency in 2022–2023 to 53% in 2025–2026, while science increased from 46% to 60%, with a dip along the way. ELA edged up from 52% to 55% over that span but fell from 61% the previous year. Attendance improved notably: chronic absenteeism dropped from 33% in 2021–2022 to 8% in 2025–2026, the lowest rate among nearby schools. SchoolDigger places Isleton at the 73rd percentile with 4 stars, ahead of nearby Summer Lake Elementary at the 41st percentile. Context for families: the 2024–2025 free/reduced lunch eligible rate was 79%, and the student-teacher ratio was 23.5:1, toward the higher end of the nearby range. With 188 students, year-to-year test percentages may be sensitive to the number tested.

188

Students ?

23.5

Student/teacher ratio ?

$17,054

Per pupil spending ?

79.3%

Free/reduced lunch eligible (2024-25) ?

All students in California receive free school meals.

≥ 95%

Kindergartners with all required immunizations (2024-25)

412 Union St.
Isleton, CA 95641-0728

(916) 777-6515

District: River Delta Joint Unified

Students who attend Isleton Elementary usually attend:

Middle:	Riverview Middle
High:	Rio Vista High

Racial breakdown:

Hispanic:

64.4%

White:

29.8%

Two or more races:

3.7%

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At a glance

▲ Ranking trend: Improving — 58th percentile in 2015 → 73rd in 2026

Strengths

✓Test scores above the California average (55% vs 42% meeting standards)

✓Ranking is trending up — up 15 percentile points since 2015

✓Above the California median (73rd percentile)

Worth a look

!Large classes — about 24 students per teacher

Students meeting standards (2025-2026) ?

This school55%

District avg28%

California avg42%

1,576^th of 5,817

California public elementary schools ?

Top 27%▲ up 3 pts since 2016

See the entire ranking list of California Elementary Schools →

★★★★★

SchoolDigger rating ?

1^st of 3Elementary Schools in the River Delta Joint Unified

1057^th of 1,530River Delta Joint 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	70.3	1576 of 5817	72.9%	★★★★☆
2025	73.3	1458 of 5857	75.1%	★★★★☆
2024	67.8	1691 of 5869	71.2%	★★★★☆
2023	63.7	1854 of 5859	68.4%	★★★☆☆
2022	57.5	2150 of 5883	63.5%	★★★☆☆
2019	76.6	1318 of 5789	77.2%	★★★★☆
2018	74.5	1377 of 5662	75.7%	★★★★☆
2017	74.2	1379 of 5692	75.8%	★★★★☆
2016	67.0	1663 of 5614	70.4%	★★★★☆
2015	51.7	2357 of 5611	58.0%	★★★☆☆
2013	74.5	1349 of 5530	75.6%	★★★★☆
2012	73.9	1334 of 5390	75.3%	★★★★☆
2011	65.5	1715 of 5377	68.1%	★★★☆☆
2010	42.7	3003 of 5314	43.5%	★★☆☆☆
2009	49.5	2518 of 5193	51.5%	★★★☆☆
2008	25.4	3941 of 5113	22.9%	★☆☆☆☆
2007	20.1	4286 of 5113	16.2%	★☆☆☆☆
2006	15.1	4351 of 4818	9.7%	☆☆☆☆☆
2005	42.6	2570 of 4822	46.7%	★★☆☆☆
2004	19.8	3944 of 4809	18.0%	★☆☆☆☆

Female

Year	Avg score	Statewide rank	California percentile	Rating
2026	57.8	2090 of 5581	62.6%	★★★☆☆
2025	62.1	1861 of 5597	66.8%	★★★☆☆
2024	65.8	1669 of 5612	70.3%	★★★★☆
2023	49.3	2449 of 5609	56.3%	★★★☆☆
2022	65.8	1701 of 5635	69.8%	★★★☆☆
2018	93.0	364 of 5413	93.3%	★★★★★

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2026	71.2	1137 of 5094	77.7%	★★★★☆
2025	72.8	1070 of 5107	79.0%	★★★★☆
2024	76.1	894 of 5107	82.5%	★★★★☆
2023	69.4	1205 of 5087	76.3%	★★★★☆
2022	59.2	1675 of 5084	67.1%	★★★☆☆
2019	79.9	712 of 4963	85.7%	★★★★☆
2018	75.0	904 of 4830	81.3%	★★★★☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2026	75.9	956 of 5423	82.4%	★★★★☆
2025	78.3	848 of 5460	84.5%	★★★★☆
2024	76.4	998 of 5517	81.9%	★★★★☆
2023	68.7	1283 of 5363	76.1%	★★★★☆
2022	74.4	987 of 5264	81.3%	★★★★☆
2019	84.0	537 of 5173	89.6%	★★★★☆
2018	78.4	753 of 5084	85.2%	★★★★☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2026	70.6	1478 of 5603	73.6%	★★★★☆
2025	72.6	1404 of 5628	75.1%	★★★★☆
2024	64.7	1761 of 5643	68.8%	★★★☆☆
2023	70.0	1509 of 5638	73.2%	★★★★☆
2022	48.8	2510 of 5663	55.7%	★★★☆☆
2019	72.7	1398 of 5510	74.6%	★★★★☆
2018	71.5	1419 of 5431	73.9%	★★★★☆

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)

Low Socio Economic Status (2026)82nd percentile+9 vs school

Hispanic (2026)78th percentile+5 vs school

Male (2026)74th percentile~ school

Female (2026)63rd percentile-10 vs school

By subject vs California (2025-2026) ?

Science60%+24 vs state

English Language Arts/Literacy55%+6 vs state

Mathematics53%+15 vs state

★

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Schools Near Isleton Elementary

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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 Vaccination Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				CSA Spanish Overall (2026)					CSA Spanish Listening (2026)					CSA Spanish Writing (2026)					CSA Spanish Reading (2026)					CAST Science (2026)			Smarter Balanced Assessments English Language Arts/Literacy (2026)							Smarter Balanced Assessments Mathematics (2026)							Vaccination (2024-25)		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	CSA Spanish Overall 3rd Grade	CSA Spanish Overall 4th Grade	CSA Spanish Overall 5th Grade	CSA Spanish Overall 6th Grade	CSA Spanish Overall All Grades	CSA Spanish Listening 3rd Grade	CSA Spanish Listening 4th Grade	CSA Spanish Listening 5th Grade	CSA Spanish Listening 6th Grade	CSA Spanish Listening All Grades	CSA Spanish Writing 3rd Grade	CSA Spanish Writing 4th Grade	CSA Spanish Writing 5th Grade	CSA Spanish Writing 6th Grade	CSA Spanish Writing All Grades	CSA Spanish Reading 3rd Grade	CSA Spanish Reading 4th Grade	CSA Spanish Reading 5th Grade	CSA Spanish Reading 6th Grade	CSA Spanish Reading All Grades	CAST Science 5th Grade	CAST Science 8th Grade	CAST Science All Grades	Smarter Balanced Assessments English Language Arts/Literacy 3rd Grade	Smarter Balanced Assessments English Language Arts/Literacy 4th Grade	Smarter Balanced Assessments English Language Arts/Literacy 5th Grade	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 3rd Grade	Smarter Balanced Assessments Mathematics 4th Grade	Smarter Balanced Assessments Mathematics 5th Grade	Smarter Balanced Assessments Mathematics 6th Grade	Smarter Balanced Assessments Mathematics 7th Grade	Smarter Balanced Assessments Mathematics 8th Grade	Smarter Balanced Assessments Mathematics All Grades	Vaccination: Kindergartners with all required immunizations	Vaccination: Exemption rate	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Isleton Elementary	Public	K-6	412 Union St.	Isleton	95641	Sacramento County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(916) 777-6515	188	8	23.5	79.3%	56 (29.8%)	1 (0.5%)	121 (64.4%)	2 (1.1%)	0 (0.0%)	1 (0.5%)	7 (3.7%)	70.3	1576^th of 5817 public elementary schools	72.9%		73.3	1458^th of 5857 public elementary schools	75.1%	118																					60.0		60.0	36.4	48.2	65.0	72.7			55.0	31.8	66.7	65.0	47.8			53.3	≥ 95%		$17,054	$1,880	$15,174
D. H. White Elementary	Public	K-6	500 Elm Way	Rio Vista	94571	Solano County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(707) 374-5335	432	20	21.6	76.9%	149 (34.5%)	18 (4.2%)	195 (45.1%)	6 (1.4%)	5 (1.2%)	8 (1.9%)	51 (11.8%)	27.2	4217^th of 5817 public elementary schools	27.5%		20.7	4766^th of 5857 public elementary schools	18.6%	549																					24.4		24.4	28.3	41.2	24.4	26.9			31.3	26.1	30.9	11.1	32.7			26.1	≥ 98%		$14,760	$562	$14,198
Walnut Grove Elementary	Public	K-6	14181 Grove St.	Walnut Grove	95690	Sacramento County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(916) 776-1844	131	8	16.3	93.1%	13 (9.9%)	4 (3.1%)	108 (82.4%)	2 (1.5%)	0 (0.0%)	0 (0.0%)	4 (3.1%)	31.2	3891^st of 5817 public elementary schools	33.1%		27.3	4191^st of 5857 public elementary schools	28.4%	300																					6.7		6.7	46.2	76.9	20.0	31.6			41.7	30.8	53.9	6.7	10.0			23.0	93%	0%	$18,927	$1,925	$17,002
New Hope Elementary	Public	K-8	26675 North Sacramento Blvd.	Thornton	95686	San Joaquin County	New Hope Elementary	No	(n/a)	No	(n/a)	(209) 794-2376	164	9	18.9	78.0%	9 (5.5%)	2 (1.2%)	148 (90.2%)	1 (0.6%)	0 (0.0%)	0 (0.0%)	4 (2.4%)	18.3	4954^th of 5817 public elementary schools	14.8%		16	5182^nd of 5857 public elementary schools	11.5%	228																					17.7	37.5	27.3	31.6	18.8	35.3	27.3	53.3	76.5	39.6	31.6	18.8	11.8	9.1	28.6	31.3	21.2			$21,168	$6,954	$14,214
Bates Elementary	Public	K-6	180 Primasing Ave.	Courtland	95615	Sacramento County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(916) 775-1771	82	4	20.5	93.9%	1 (1.2%)	0 (0.0%)	78 (95.1%)	1 (1.2%)	0 (0.0%)	2 (2.4%)	0 (0.0%)								(n/a)		0.0			3.0		0.0			6.1		9.1			9.1		0.0			0.0					9.1					42.4		0.0					21.2			$20,411	$2,899	$17,512
Summer Lake Elementary	Public	K-5	4320 East Summer Lake Dr.	Oakley	94561	Contra Costa County	Oakley Union Elementary	No	(n/a)	No	(n/a)	(925) 625-6730	595	25	23.8	43.9%	132 (22.2%)	71 (11.9%)	229 (38.5%)	98 (16.5%)	3 (0.5%)	2 (0.3%)	60 (10.1%)	37.2	3426^th of 5817 public elementary schools	41.1%		38.1	3339^th of 5857 public elementary schools	43.0%	87																					32.6		32.6	34.1	39.0	43.7				38.9	39.8	26.8	27.7				31.6	96%	0%	$14,255	$836	$13,419
Vintage Parkway Elementary	Public	K-5	1000 Vintage Pkwy.	Oakley	94561	Contra Costa County	Oakley Union Elementary	No	(n/a)	No	(n/a)	(925) 625-6800	481	20	24.0	44.3%	123 (25.6%)	25 (5.2%)	274 (57.0%)	19 (4.0%)	3 (0.6%)	4 (0.8%)	33 (6.9%)	32.6	3771^st of 5817 public elementary schools	35.2%		39.1	3279^th of 5857 public elementary schools	44.0%	492																					26.3		26.3	41.7	36.1	37.5				38.4	41.7	23.6	18.8				27.7	98%	0%	$14,625	$880	$13,745
Iron House Elementary	Public	K-5	4801 Frank Hengel Way	Oakley	94561	Contra Costa County	Oakley Union Elementary	No	(n/a)	No	(n/a)	(925) 625-6825	503	21	24.5	44.9%	88 (17.5%)	92 (18.3%)	183 (36.4%)	91 (18.1%)	0 (0.0%)	3 (0.6%)	46 (9.1%)	26.8	4248^th of 5817 public elementary schools	27.0%		29.4	4012^th of 5857 public elementary schools	31.5%	236																					19.6		19.6	35.2	35.2	28.8				33.5	31.0	34.1	8.6				26.3	93%	0%	$14,866	$875	$13,991
Oakley Elementary	Public	K-5	501 Norcross Ln.	Oakley	94561	Contra Costa County	Oakley Union Elementary	No	(n/a)	No	(n/a)	(925) 625-7050	379	18	21.0	54.4%	74 (19.5%)	10 (2.6%)	241 (63.6%)	26 (6.9%)	1 (0.3%)	2 (0.5%)	25 (6.6%)	23.5	4516^th of 5817 public elementary schools	22.4%		19.1	4913^th of 5857 public elementary schools	16.1%	397																					21.8		21.8	37.0	18.6	34.6				29.4	41.7	13.3	18.2				23.3	92%	0%	$19,689	$1,078	$18,611
Orchard Park	Public	K-8	5150 Live Oak Ave.	Oakley	94561	Contra Costa County	Antioch Unified	No	(n/a)	No	(n/a)	(925) 779-7445	751	30	24.6	72.6%	130 (17.3%)	120 (16.0%)	372 (49.5%)	64 (8.5%)	2 (0.3%)	7 (0.9%)	56 (7.5%)	31.8	3838^th of 5817 public elementary schools	34.0%		26.3	4294^th of 5857 public elementary schools	26.7%	456																					21.5	36.7	29.6	39.4	31.7	36.7	42.1	43.8	60.0	42.7	26.8	23.4	26.6	31.3	14.6	17.8	23.3	93%	1%	$21,099	$1,932	$19,167

Frequently Asked Questions about Isleton Elementary

What district is Isleton Elementary in?

River Delta Joint Unified

How many students attend Isleton Elementary?

In the 2024-25 school year, 188 students attended Isleton Elementary.

What is the racial makeup of Isleton Elementary?

Students at Isleton Elementary are 64% Hispanic, 30% White, 4% Two or more races, 1% Asian.

What schools do graduates of Isleton Elementary attend?

Students who attend Isleton Elementary usually go on to attend:

Middle : Riverview Middle
High : Rio Vista High

Is Isleton Elementary a good school?

Isleton Elementary ranks 1576^th of 5817 California elementary schools. SchoolDigger rates this school 4 stars out of 5.

Rate Isleton Elementary!

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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.