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Sonoma Mountain Elementary

Public, Charter Grades K-6

287^th

SchoolDigger Rank ?

of 5,817 California Elementary Schools

Better than 95% of California elementary schools

Summary

Sonoma Mountain Elementary is a K–6 school in Petaluma’s Old Adobe Union district, serving 422 students in the surrounding area. In 2025–2026, 80% of students were proficient in English language arts (ELA), 77% in math, and 67% in science; the school exceeded both district and state results in every subject. Its standout finding is that it had the highest results in all three subjects among nearby K–6 schools.

The school’s largest advantage over the state was in math: its proficiency rate was 39 percentage points higher, compared with 31 points higher in ELA and science. It also led nearby K–6 peers by 9 points in math, 7 in ELA, and 6 in science over the next-highest school in each subject. Fifth-grade ELA is a relative soft spot: its 73% result was below Corona Creek Elementary at 76% and Meadow Elementary at 74%. Even so, the school led nearby peers in math in every tested grade, and its overall results were well above those of the Old Adobe Union district and California.

Results have risen since 2022–2023: ELA increased by 10 percentage points, math by 16, and science by 31. Over the same period, the school’s leads over state results grew by 7 points in ELA, 12 in math, and 25 in science. SchoolDigger awarded it 5 stars and the 95th statewide percentile in 2025–2026, up from the 81st percentile in 2021–2022. SchoolDigger’s ranking for Low Socio Economic Status Students reached the 99th percentile in 2025–2026, up from the 80th in 2021–2022—a notably strong result for how well the school serves this group. Chronic absenteeism was 4% in 2025–2026, down from 14% in 2021–2022. Context for families: the 2024–2025 student-teacher ratio was 24.8, and 15% of students were free/reduced lunch eligible, compared with a 40% average among nearby K–6 peers.

422

Students ?

24.8

Student/teacher ratio ?

$18,830

Per pupil spending ?

15.4%

Free/reduced lunch eligible (2024-25) ?

All students in California receive free school meals.

≥ 98%

Kindergartners with all required immunizations (2024-25)

1900 Rainier Cir.
Petaluma, CA 94954-2543

(707) 765-4305

District: Old Adobe Union

Students who attend Sonoma Mountain Elementary usually attend:

Middle:	Kenilworth Junior High
High:	Casa Grande High

Racial breakdown:

White:

69.7%

Hispanic:

14.2%

Two or more races:

10.0%

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At a glance

▲ Ranking trend: Improving — 75th percentile in 2015 → 95th in 2026

Strengths

✓Test scores above the California average (77% vs 42% meeting standards)

✓Ranks in the top 5% of California elementary schools

✓Ranking is trending up — up 20 percentile points since 2015

Worth a look

!Large classes — about 25 students per teacher

Students meeting standards (2025-2026) ?

This school77%

District avg51%

California avg42%

287^th of 5,817

California public elementary schools ?

Top 5%▲ up 20 pts since 2016

From top 25% (2016) to top 5% (2026)

See the entire ranking list of California Elementary Schools →

★★★★★

SchoolDigger rating ?

1^st of 5Elementary Schools in the Old Adobe Union

524^th of 1,530Old Adobe Union 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	95.5	287 of 5817	95.1%	★★★★★
2025	93.3	451 of 5857	92.3%	★★★★★
2024	85.9	912 of 5869	84.5%	★★★★☆
2023	83.6	1012 of 5859	82.7%	★★★★☆
2022	81.7	1108 of 5883	81.2%	★★★★☆
2019	76.9	1304 of 5789	77.5%	★★★★☆
2018	82.5	1006 of 5662	82.2%	★★★★☆
2017	83.9	964 of 5692	83.1%	★★★★☆
2016	73.3	1385 of 5614	75.3%	★★★★☆
2015	72.7	1392 of 5611	75.2%	★★★★☆
2013	69.6	1590 of 5530	71.2%	★★★★☆
2012	70.2	1522 of 5390	71.8%	★★★★☆
2011	71.5	1424 of 5377	73.5%	★★★★☆
2010	77.6	1103 of 5314	79.2%	★★★★☆
2009	76.4	1154 of 5193	77.8%	★★★★☆
2008	77.4	1088 of 5113	78.7%	★★★★☆
2007	81.4	919 of 5113	82.0%	★★★★☆
2006	80.1	964 of 4818	80.0%	★★★★☆
2005	76.0	1095 of 4822	77.3%	★★★★☆
2004	79.7	902 of 4809	81.2%	★★★★☆

Female

Year	Avg score	Statewide rank	California percentile	Rating
2026	95.1	244 of 5581	95.6%	★★★★★
2025	92.9	389 of 5597	93.0%	★★★★★
2024	87.1	765 of 5612	86.4%	★★★★☆
2023	83.4	962 of 5609	82.8%	★★★★☆
2022	87.2	770 of 5635	86.3%	★★★★☆
2019	86.1	762 of 5492	86.1%	★★★★☆
2018	82.4	936 of 5413	82.7%	★★★★☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2024	73.0	1049 of 5107	79.5%	★★★★☆
2023	77.5	848 of 5087	83.3%	★★★★☆
2022	74.2	972 of 5084	80.9%	★★★★☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2026	98.0	68 of 5423	98.7%	★★★★★
2024	85.6	603 of 5517	89.1%	★★★★☆
2022	72.8	1042 of 5264	80.2%	★★★★☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2026	94.0	313 of 5603	94.4%	★★★★★
2025	90.7	535 of 5628	90.5%	★★★★★
2024	82.1	998 of 5643	82.3%	★★★★☆
2023	81.6	1029 of 5638	81.7%	★★★★☆
2022	70.8	1484 of 5663	73.8%	★★★★☆
2019	64.2	1764 of 5510	68.0%	★★★☆☆
2018	79.5	1083 of 5431	80.1%	★★★★☆

White

Year	Avg score	Statewide rank	California percentile	Rating
2026	86.3	207 of 2536	91.8%	★★★★★
2025	81.5	361 of 2598	86.1%	★★★★☆
2024	70.9	783 of 2651	70.5%	★★★★☆
2023	65.1	960 of 2661	63.9%	★★★☆☆
2022	63.1	1037 of 2726	62.0%	★★★☆☆
2019	55.7	1349 of 2834	52.4%	★★★☆☆
2018	63.5	1059 of 2737	61.3%	★★★☆☆

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)99th percentile+4 vs school

Female (2026)96th percentile~ school

Male (2026)94th percentile~ school

White (2026)92nd percentile-3 vs school

Hispanic (2024)79th percentile-5 vs school

By subject vs California (2025-2026) ?

English Language Arts/Literacy80%+31 vs state

Mathematics77%+39 vs state

Science67%+31 vs state

★

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Schools Near Sonoma Mountain 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 7th Grade	CSA Spanish Overall All Grades	CSA Spanish Listening 3rd Grade	CSA Spanish Listening 4th Grade	CSA Spanish Listening 5th Grade	CSA Spanish Listening 7th Grade	CSA Spanish Listening All Grades	CSA Spanish Writing 3rd Grade	CSA Spanish Writing 4th Grade	CSA Spanish Writing 5th Grade	CSA Spanish Writing 7th Grade	CSA Spanish Writing All Grades	CSA Spanish Reading 3rd Grade	CSA Spanish Reading 4th Grade	CSA Spanish Reading 5th Grade	CSA Spanish Reading 7th 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
Sonoma Mountain Elementary	Public, Charter	K-6	1900 Rainier Cir.	Petaluma	94954	Sonoma County	Old Adobe Union	Yes	(n/a)	No	(n/a)	(707) 765-4305	422	17	24.8	15.4%	294 (69.7%)	1 (0.2%)	60 (14.2%)	22 (5.2%)	3 (0.7%)	0 (0.0%)	42 (10.0%)	95.5	287^th of 5817 public elementary schools	95.1%		93.3	451^st of 5857 public elementary schools	92.3%	164																					66.7		66.7	87.5	83.1	73.3	78.0			80.3	87.5	84.8	70.0	66.1			76.9	≥ 98%		$18,830	$1,111	$17,719
Loma Vista Immersion Academy	Public, Charter	K-6	207 Maria Dr.	Petaluma	94954	Sonoma County	Old Adobe Union	Yes	(n/a)	No	(n/a)	(707) 765-4302	451	18	24.5	45.9%	101 (22.4%)	4 (0.9%)	329 (72.9%)	3 (0.7%)	1 (0.2%)	1 (0.2%)	12 (2.7%)	43.7	3007^th of 5817 public elementary schools	48.3%		43.1	3000^th of 5857 public elementary schools	48.8%	7																					22.9		22.9	27.0	39.0	39.6	56.5			39.4	38.1	45.8	35.4	43.5			40.7	≥ 98%		$20,610	$1,238	$19,372
Meadow Elementary	Public	K-6	880 Maria Dr.	Petaluma	94954	Sonoma County	Waugh Elementary	No	(n/a)	No	(n/a)	(707) 762-4905	384	17	22.1	13.3%	226 (58.9%)	3 (0.8%)	77 (20.1%)	21 (5.5%)	0 (0.0%)	2 (0.5%)	55 (14.3%)	91	589^th of 5817 public elementary schools	89.9%		93.2	461^st of 5857 public elementary schools	92.1%	128																					60.4		60.4	65.2	83.0	73.6	69.7			72.9	73.9	75.9	58.5	65.2			68.0	≥ 98%		$15,252	$51	$15,201
Corona Creek Elementary	Public	K-6	1851 Hartman Ln.	Petaluma	94954	Sonoma County	Waugh Elementary	No	(n/a)	No	(n/a)	(707) 765-3331	403	18	21.9	14.4%	254 (63.0%)	6 (1.5%)	95 (23.6%)	22 (5.5%)	2 (0.5%)	0 (0.0%)	23 (5.7%)	81.1	1079^th of 5817 public elementary schools	81.5%		79.2	1188^th of 5857 public elementary schools	79.7%	109																					54.2		54.2	51.2	76.2	76.3	60.7			67.4	44.2	77.8	61.0	44.6			58.4	≥ 98%		$14,690	$49	$14,641
McDowell Elementary	Public	K-6	421 South McDowell Blvd.	Petaluma	94954	Sonoma County	Petaluma City Elementary	No	(n/a)	No	(n/a)	(707) 778-4745	329	14	23.5	86.0%	21 (6.4%)	8 (2.4%)	273 (83.0%)	11 (3.3%)	4 (1.2%)	6 (1.8%)	6 (1.8%)	7.8	5708^th of 5817 public elementary schools	1.9%		11.1	5560^th of 5857 public elementary schools	5.1%	148	0.0	8.0	4.2		4.1	20.8	16.0	29.2		21.9	0.0	20.0	12.5		11.0	0.0	8.0	4.2		4.1	10.2		10.2	6.1	6.7	8.3	18.8			9.2	12.0	13.3	8.3	18.8			12.6	≥ 98%		$17,862	$1,774	$16,088
McKinley Elementary	Public	K-6	110 Ellis St.	Petaluma	94952	Sonoma County	Petaluma City Elementary	No	(n/a)	No	(n/a)	(707) 778-4750	368	15	24.5	50.8%	125 (34.0%)	6 (1.6%)	172 (46.7%)	26 (7.1%)	6 (1.6%)	2 (0.5%)	29 (7.9%)	46.4	2825^th of 5817 public elementary schools	51.4%		43.7	2967^th of 5857 public elementary schools	49.3%	142																					26.7		26.7	35.3	51.8	41.3	43.6			43.9	26.5	46.4	37.8	35.5			37.6	97%	0%	$17,301	$976	$16,325
Old Adobe Elementary Charter	Public, Charter	K-6	2856 Adobe Rd.	Petaluma	94954	Sonoma County	Old Adobe Union	Yes	(n/a)	No	(n/a)	(707) 765-4301	278	11	25.2	34.5%	192 (69.1%)	1 (0.4%)	68 (24.5%)	1 (0.4%)	0 (0.0%)	0 (0.0%)	16 (5.8%)	62.9	1937^th of 5817 public elementary schools	66.7%		61.1	2010^th of 5857 public elementary schools	65.7%	73																					51.1		51.1	37.5	51.9	60.0	48.7			51.1	37.5	48.2	40.0	48.7			43.6	≥ 98%		$19,219	$1,122	$18,097
La Tercera Elementary	Public	K-6	1600 Albin Way	Petaluma	94954	Sonoma County	Old Adobe Union	No	(n/a)	No	(n/a)	(707) 765-4303	295	13	23.6	37.3%	157 (53.2%)	8 (2.7%)	107 (36.3%)	7 (2.4%)	2 (0.7%)	2 (0.7%)	12 (4.1%)	65	1823^rd of 5817 public elementary schools	68.7%		62	1962^nd of 5857 public elementary schools	66.5%	139																					42.1		42.1	52.9	52.6	55.3	67.9			57.8	47.1	34.2	34.2	54.7			43.9	≥ 98%		$20,369	$1,311	$19,058
Cinnabar Charter	Public, Charter	K-6	286 Skillman Ln.	Petaluma	94952	Sonoma County	Cinnabar Elementary	Yes	(n/a)	No	(n/a)	(707) 765-4345	156	9	16.4	83.3%	23 (14.7%)	1 (0.6%)	125 (80.1%)	0 (0.0%)	1 (0.6%)	1 (0.6%)	5 (3.2%)	19.6	4845^th of 5817 public elementary schools	16.7%		21.3	4719^th of 5857 public elementary schools	19.4%	126																					25.0	38.5	29.3	25.0	15.8	39.3	21.1	33.3	46.2	29.9	18.8	10.5	25.0	5.3	16.7	38.5	18.7			$16,045	$448	$15,597
Cinnabar Elementary	Public	K	286 Skillman Ln.	Petaluma	94952	Sonoma County	Cinnabar Elementary	No	(n/a)	No	(n/a)	(707) 765-4345	20	1	20.0	65.0%	4 (20.0%)	0 (0.0%)	15 (75.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1 (5.0%)								(n/a)																																						≥ 95%		$17,773	$448	$17,325

Frequently Asked Questions about Sonoma Mountain Elementary

What is the racial makeup of Sonoma Mountain Elementary?

Students at Sonoma Mountain Elementary are 70% White, 14% Hispanic, 10% Two or more races, 5% Asian.

What district is Sonoma Mountain Elementary in?

Old Adobe Union

What schools do graduates of Sonoma Mountain Elementary attend?

Students who attend Sonoma Mountain Elementary usually go on to attend:

Middle : Kenilworth Junior High
High : Casa Grande High

Is Sonoma Mountain Elementary a good school?

Yes! Sonoma Mountain Elementary is one of the best elementary schools in the state. It ranks 287^th of 5817 California elementary schools.

How many students attend Sonoma Mountain Elementary?

In the 2024-25 school year, 422 students attended Sonoma Mountain Elementary.

Rate Sonoma Mountain 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.