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River Delta Joint Unified

Coming soon: We're expecting this year's test scores from the California Department of Education any day now — new rankings will be posted the moment they're released!

Coming soon: This year's test scores are expected from the California Department of Education any day now — new rankings will follow the moment they're released!

At a glance

1025^thof 1,543 California districts▲ 151

Better than 33% of California districts

Elementary 4 Middle 2 High 4 Alternative 1Grades K-12

445 Montezuma St.
Rio Vista, CA 94571-1651·(707) 374-1700·All California district rankings →

Statewide performance 2016–2025

2025: better than 33.6% of districts

Schools

1,705

Students

Top rankedIsleton Elementary1458^th of 5,857 California elementary schools

▲

Biggest riser

Bates Elementary up 1,505 spots statewide this year

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Smallest classes

Delta High 15.7 students per teacher

SchoolDigger ratings

4★

3★

2★

1★

0★

3 schools without a SchoolDigger rating (too few tested students)

Compare California districts →See the top-ranked California schools →

Summary:

The River Delta Joint Unified district operates ten schools serving grades K-12 across several small communities in the Sacramento-San Joaquin Delta region, ranking in the 34th percentile statewide while serving a student population with high economic need.

Academic performance varies widely across the district, with Isleton Elementary standing out as a top performer, exceeding state averages in all subjects despite serving many low-income students. In contrast, Clarksburg Middle faces significant challenges, with proficiency rates in the single digits for math and science. The district's high schools, including Rio Vista High and Delta High, maintain strong graduation rates above 92%, but struggle deeply with math proficiency, all falling below 15%.

Attendance is a mixed picture, where the small River Delta High/Elementary (Alternative) school has very low chronic absenteeism at 5.6%, but Mokelumne High (Continuation) reports a 100% rate. Promisingly, Bates Elementary has shown remarkable improvement, jumping from the 19th to the 62nd percentile in recent years, demonstrating that growth is possible within the district.

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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)				CSA Spanish Overall (2025)			CSA Spanish Listening (2025)			CSA Spanish Writing (2025)			CSA Spanish Reading (2025)			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 (2025)	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	CSA Spanish Overall 3rd Grade	CSA Spanish Overall 6th Grade	CSA Spanish Overall All Grades	CSA Spanish Listening 3rd Grade	CSA Spanish Listening 6th Grade	CSA Spanish Listening All Grades	CSA Spanish Writing 3rd Grade	CSA Spanish Writing 6th Grade	CSA Spanish Writing All Grades	CSA Spanish Reading 3rd Grade	CSA Spanish Reading 6th Grade	CSA Spanish Reading All Grades	CAST Science 5th Grade	CAST Science 8th Grade	CAST Science 11th Grade	CAST Science 12th 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 11th 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 11th Grade	Smarter Balanced Assessments Mathematics All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Mokelumne High (Continuation)	Public	9-12	160 Courtland High School Ln.	Courtland	95615	Sacramento County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(916) 775-1771	8	1	8.8		5 (62.5%)	0 (0.0%)	3 (37.5%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)																																		$41,289	$40,934	$355
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%)	56	2252^nd of 5857 public elementary schools	61.6%		32.2	3757^th of 5869 public elementary schools	36.0%	1505	0.0	12.5	6.7	0.0	18.8	13.3	0.0	12.5	8.9	0.0	12.5	6.7						18.2			75.0				44.4	9.1			56.3				31.1	$21,847	$18,948	$2,899
Delta High	Public	10-12	52810 Netherlands Ave.	Clarksburg	95612	Yolo County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(916) 744-1714	196	12	15.7	75.0%	40 (20.4%)	3 (1.5%)	142 (72.4%)	2 (1.0%)	1 (0.5%)	1 (0.5%)	7 (3.6%)	28.1	1524^th of 2162 public high schools	29.5%		46	1100^th of 2159 public high schools	49.1%	424															17.7		17.2							35.5	35.5							9.8	9.8	$20,116	$19,514	$602
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%)	73.3	1458^th of 5857 public elementary schools	75.1%		67.8	1691^st of 5869 public elementary schools	71.2%	233													56.5				56.5	60.9	68.4	65.2	53.3				61.1	60.9	55.0	69.6	23.3				50.0	$18,564	$16,684	$1,880
Rio Vista High	Public	9-12	410 S 4th St.	Rio Vista	94571	Solano County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(707) 374-6336	317	19	16.7	71.9%	109 (34.4%)	8 (2.5%)	165 (52.1%)	5 (1.6%)	2 (0.6%)	2 (0.6%)	26 (8.2%)	33.2	1418^th of 2162 public high schools	34.4%		14	1853^rd of 2159 public high schools	14.2%	435															22.1	7.1	19.5							36.2	36.2							14.5	14.5	$21,127	$20,440	$687
Riverview Middle	Public	7-8	525 South 2nd St.	Rio Vista	94571	Solano County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(707) 374-2345	160	9	17.8	76.9%	54 (33.8%)	5 (3.1%)	77 (48.1%)	5 (3.1%)	1 (0.6%)	0 (0.0%)	18 (11.3%)	36.5	1602^nd of 2761 public middle schools	42.0%		33.6	1684^th of 2783 public middle schools	39.5%	82														28.1			28.1					39.1	39.3		39.2					23.2	22.5		22.8	$21,998	$21,350	$648
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%)	27.3	4191^st of 5857 public elementary schools	28.4%		16.9	5127^th of 5869 public elementary schools	12.6%	936													11.1				11.1	53.3	23.5	22.2	33.3				32.4	53.3	11.8	22.2	16.7				25.0	$21,759	$19,834	$1,925
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%)	20.7	4766^th of 5857 public elementary schools	18.6%		17.2	5093^rd of 5869 public elementary schools	13.2%	327													13.0				13.0	27.9	22.6	18.5	34.0				25.8	29.1	15.1	7.4	38.3				22.8	$16,306	$15,744	$562
River Delta High/Elementary (Alternative)	Public, Alternative	K-12	525 South 2nd St.	Rio Vista	94571	Solano County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(707) 374-2345	18	2	9.5	66.7%	15 (83.3%)	0 (0.0%)	1 (5.6%)	0 (0.0%)	1 (5.6%)	0 (0.0%)	1 (5.6%)								(n/a)																									33.3								8.3	$36,007	$35,652	$355
River Delta Community Day	Public	7-12	160 Courtland High School Ln.	Courtland	95615	Sacramento County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(916) 775-1771	2	1	1.6		0 (0.0%)	1 (50.0%)	1 (50.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)																																		$93,241	$92,886	$355
Clarksburg Middle	Public	7-9	52870 Netherlands Rd.	Clarksburg	95612	Yolo County	River Delta Joint Unified	No	(n/a)	No	(n/a)	(916) 744-1717	171	10	17.2	75.4%	27 (15.8%)	5 (2.9%)	130 (76.0%)	1 (0.6%)	1 (0.6%)	0 (0.0%)	7 (4.1%)	9.1	2643^rd of 2761 public middle schools	4.3%		11.3	2618^th of 2783 public middle schools	5.9%	25														5.3			5.3					21.1	12.3		16.7					10.5	5.3		7.9	$18,741	$18,272	$469

Districts nearby

District	Distance	# of Schools	Statewide Rank
Delta Elementary Charter District	6.44 mi	1	616^th
Elk Grove Unified	6.89 mi	69	562^nd
SAVA - Sacramento Academy and Vocational Academy - EGUSD Di	8.87 mi	1	1403^rd
New Hope Elementary	10.51 mi	1	1239^th
Sacramento City Unified	10.66 mi	82	982^nd

See the top CA California districts

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.