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Harold William Kolb

Public Grades K-5

49^th

SchoolDigger Rank ?

of 5,817 California Elementary Schools

Better than 99% of California elementary schools

Summary

Harold William Kolb is a 696-student K–5 elementary school in Dublin, California, part of Dublin Unified. Its most important strength is its consistently high achievement: in 2025–2026, 87% of students were proficient in English Language Arts/Literacy (ELA), 88% in math and 77% in science.

Kolb leads nearby K–5 schools in ELA and math and ranks second in science. Its results were 9, 8 and 10 percentage points above the nearby-peer averages of 78% in ELA, 80% in math and 67% in science; in science, only Walnut Grove Elementary scored higher. Kolb also exceeds state and district proficiency in all three subjects: its advantage over California is 38 points in ELA, 49 in math and 41 in science, while its advantage over Dublin Unified is 9, 14 and 16 points, respectively. Third grade stands out, with 92% proficiency in ELA and 96% in math; fourth grade is a relative dip at 80% and 82%, though results remain strong overall.

Scores improved from 2022–2023 to 2025–2026 by 6 points in ELA, 7 in math and 14 in science, although they fluctuated between those years. Attendance also improved: chronic absenteeism fell from 17% in 2021–2022 to 9% in 2025–2026, below the district’s 12% and state’s 18%. SchoolDigger ranks Kolb 49th of 5,804 California schools, in the 99th percentile, with five stars. Its 2024–2025 student–teacher ratio was 26.1, the second-highest among nearby schools; 15% of students were free/reduced lunch eligible that year, also the second-highest rate among nearby schools with the same measure. SchoolDigger’s statewide effectiveness percentile for serving Low Socio Economic Status Students rose from 52 in 2022–2023 to 95 in 2025–2026. Its effectiveness percentile for serving White Students varied more, moving from 53 in 2022–2023 to 98 in 2023–2024 and 89 in 2024–2025.

696

Students ?

26.1

Student/teacher ratio ?

$15,307

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)

3150 Palermo Way
Dublin, CA 94568-7326

(925) 551-4000

District: Dublin Unified

Students who attend Harold William Kolb usually attend:

Middle:	Eleanor Murray Fallon
High:	Dublin High

Racial breakdown:

Asian:

77.7%

White:

8.2%

Hispanic:

6.5%

See top rated California elementary schools

Compare Harold William Kolb to nearby elementary schools!

At a glance

▬ Ranking trend: Holding steady — 98th percentile in 2015 → 99th in 2026

Strengths

✓Test scores above the California average (86% vs 42% meeting standards)

✓Ranks in the top 1% of California elementary schools

✓Among the top-ranked schools in Dublin Unified

Worth a look

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

!Large classes — about 26 students per teacher

Students meeting standards (2025-2026) ?

This school86%

District avg73%

California avg42%

49^th of 5,817

California public elementary schools ?

Top 1%▲ up 3 pts since 2016

From top 4% (2016) to top 1% (2026)

See the entire ranking list of California Elementary Schools →

★★★★★

SchoolDigger rating ?

1^st of 8Elementary Schools in the Dublin Unified

117^th of 1,530Dublin 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	98.2	49 of 5817	99.2%	★★★★★
2025	97.2	140 of 5857	97.6%	★★★★★
2024	98.5	53 of 5869	99.1%	★★★★★
2023	96.3	247 of 5859	95.8%	★★★★★
2022	98.5	55 of 5883	99.1%	★★★★★
2019	97.7	95 of 5789	98.4%	★★★★★
2018	96.8	162 of 5662	97.1%	★★★★★
2017	97.0	174 of 5692	96.9%	★★★★★
2016	96.0	236 of 5614	95.8%	★★★★★
2015	98.1	91 of 5611	98.4%	★★★★★
2013	86.9	655 of 5530	88.2%	★★★★☆

Asian

Year	Avg score	Statewide rank	California percentile	Rating
2026	80.4	151 of 1210	87.5%	★★★★☆
2025	75.6	280 of 1203	76.7%	★★★★☆
2024	80.2	159 of 1205	86.8%	★★★★☆
2023	70.0	402 of 1190	66.2%	★★★☆☆
2022	79.0	176 of 1154	84.7%	★★★★☆
2019	77.8	182 of 1149	84.2%	★★★★☆
2018	77.0	214 of 1071	80.0%	★★★★☆

English Language Learner

Year	Avg score	Statewide rank	California percentile	Rating
2018	93.2	124 of 3246	96.2%	★★★★★

Female

Year	Avg score	Statewide rank	California percentile	Rating
2026	97.9	46 of 5581	99.2%	★★★★★
2025	95.6	210 of 5597	96.2%	★★★★★
2024	98.3	35 of 5612	99.4%	★★★★★
2023	95.7	229 of 5609	95.9%	★★★★★
2022	97.5	96 of 5635	98.3%	★★★★★
2019	97.3	66 of 5492	98.8%	★★★★★
2018	95.6	184 of 5413	96.6%	★★★★★

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2026	91.8	268 of 5423	95.1%	★★★★★
2025	91.4	308 of 5460	94.4%	★★★★★
2023	46.8	2576 of 5363	52.0%	★★★☆☆
2018	95.3	123 of 5084	97.6%	★★★★★

Male

Year	Avg score	Statewide rank	California percentile	Rating
2026	97.5	76 of 5603	98.6%	★★★★★
2025	97.4	84 of 5628	98.5%	★★★★★
2024	97.7	79 of 5643	98.6%	★★★★★
2023	95.5	262 of 5638	95.4%	★★★★★
2022	98.4	44 of 5663	99.2%	★★★★★
2019	97.0	120 of 5510	97.8%	★★★★★
2018	96.2	171 of 5431	96.9%	★★★★★

Multi-racial

Year	Avg score	Statewide rank	California percentile	Rating
2018	59.3	160 of 339	52.8%	★★★☆☆

Special Education

Year	Avg score	Statewide rank	California percentile	Rating
2023	98.0	59 of 2420	97.6%	★★★★★

White

Year	Avg score	Statewide rank	California percentile	Rating
2025	83.4	292 of 2598	88.8%	★★★★☆
2024	91.1	66 of 2651	97.5%	★★★★★
2023	56.0	1259 of 2661	52.7%	★★★☆☆
2019	81.6	414 of 2834	85.4%	★★★★☆
2018	74.9	650 of 2737	76.3%	★★★★☆

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)

Female (2026)99th percentile~ school

Male (2026)99th percentile~ school

Special Education (2023)98th percentile~ school

English Language Learner (2018)96th percentile~ school

Low Socio Economic Status (2026)95th percentile-4 vs school

White (2025)89th percentile-9 vs school

Asian (2026)88th percentile-12 vs school

Multi-racial (2018)53rd percentile-44 vs school

By subject vs California (2025-2026) ?

Mathematics88%+49 vs state

English Language Arts/Literacy87%+38 vs state

Science77%+41 vs state

★

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Schools Near Harold William Kolb

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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)				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	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
Harold William Kolb	Public	K-5	3150 Palermo Way	Dublin	94568	Alameda County	Dublin Unified	No	(n/a)	No	(n/a)	(925) 551-4000	696	27	26.1	15.4%	57 (8.2%)	17 (2.4%)	45 (6.5%)	541 (77.7%)	0 (0.0%)	0 (0.0%)	36 (5.2%)	98.2	49^th of 5817 public elementary schools	99.2%		97.2	140^th of 5857 public elementary schools	97.6%	91	77.0		77.0	92.0	80.2	89.0				87.2	96.0	81.9	85.0				87.8	≥ 98%		$15,307	$776	$14,531
John Green Elementary	Public	K-5	3300 Antone Way	Dublin	94568	Alameda County	Dublin Unified	No	(n/a)	No	(n/a)	(925) 833-4200	661	27	24.6	7.9%	43 (6.5%)	11 (1.7%)	26 (3.9%)	554 (83.8%)	0 (0.0%)	1 (0.2%)	26 (3.9%)	95.2	315^th of 5817 public elementary schools	94.6%		95.4	293^rd of 5857 public elementary schools	95.0%	22	64.4		64.4	82.2	70.6	79.0				77.2	87.1	76.2	80.9				81.2	≥ 99%		$17,305	$1,567	$15,738
Cottonwood Creek	Public	K-8	2400 Central Pkwy.	Dublin	94568	Alameda County	Dublin Unified	No	(n/a)	No	(n/a)	(925) 833-3333	1,023	45	22.9	13.0%	41 (4.0%)	8 (0.8%)	34 (3.3%)	908 (88.8%)	0 (0.0%)	0 (0.0%)	32 (3.1%)	96.9	151^st of 5817 public elementary schools	97.4%		97.8	85^th of 5857 public elementary schools	98.5%	66	63.4	75.0	69.3	86.5	83.1	81.3	78.3	92.4	81.9	84.0	86.6	83.5	83.9	82.2	90.7	75.0	83.7	≥ 98%		$15,210	$1,001	$14,209
J. M. Amador Elementary	Public	K-5	2100 East Cantara Dr.	Dublin	94568	Alameda County	Dublin Unified	No	(n/a)	No	(n/a)	(925) 307-1950	909	36	25.2	7.2%	46 (5.1%)	8 (0.9%)	25 (2.8%)	785 (86.4%)	0 (0.0%)	0 (0.0%)	45 (5.0%)	97.2	121^st of 5817 public elementary schools	97.9%		98.7	26^th of 5857 public elementary schools	99.6%	95	65.3		65.3	81.1	87.1	82.6				83.6	89.0	88.7	80.7				86.2	≥ 99%		$15,286	$1,270	$14,016
James Dougherty Elementary	Public	K-5	5301 Hibernia Dr.	Dublin	94568	Alameda County	Dublin Unified	No	(n/a)	No	(n/a)	(925) 803-4444	856	36	23.7	17.1%	80 (9.3%)	24 (2.8%)	85 (9.9%)	591 (69.0%)	1 (0.1%)	0 (0.0%)	75 (8.8%)	95.1	321^st of 5817 public elementary schools	94.5%		92.9	483^rd of 5857 public elementary schools	91.8%	162	63.5		63.5	86.0	76.6	73.8				78.4	90.2	80.0	71.7				80.1	≥ 99%		$16,002	$906	$15,096
Henry P. Mohr Elementary	Public	K-5	3300 Dennis Dr.	Pleasanton	94588	Alameda County	Pleasanton Unified	No	(n/a)	No	(n/a)	(925) 426-4256	492	20	24.8	9.6%	63 (12.8%)	8 (1.6%)	17 (3.5%)	370 (75.2%)	1 (0.2%)	1 (0.2%)	31 (6.3%)	96.8	166^th of 5817 public elementary schools	97.1%		97.9	79^th of 5857 public elementary schools	98.7%	87	75.0		75.0	75.3	74.4	89.1				80.2	83.6	84.5	82.6				83.5	97%	0%	$16,091	$226	$15,865
Fairlands Elementary	Public	K-5	4151 West Las Positas Blvd.	Pleasanton	94588	Alameda County	Pleasanton Unified	No	(n/a)	No	(n/a)	(925) 426-4210	670	26	25.7	10.6%	83 (12.4%)	9 (1.3%)	51 (7.6%)	485 (72.4%)	5 (0.7%)	0 (0.0%)	37 (5.5%)	95.8	252^nd of 5817 public elementary schools	95.7%		92	548^th of 5857 public elementary schools	90.6%	296	68.1		68.1	84.0	73.3	81.9				79.5	86.2	75.7	77.9				79.5	98%	0%	$15,358	$226	$15,132
Alisal Elementary	Public	K-5	1454 Santa Rita Rd.	Pleasanton	94566	Alameda County	Pleasanton Unified	No	(n/a)	No	(n/a)	(925) 426-4200	544	23	23.6	8.8%	138 (25.4%)	9 (1.7%)	60 (11.0%)	289 (53.1%)	3 (0.6%)	1 (0.2%)	44 (8.1%)	88.7	716^th of 5817 public elementary schools	87.7%		85.9	886^th of 5857 public elementary schools	84.9%	170	57.7		57.7	74.0	72.8	68.8				71.6	79.7	63.8	56.7				65.7	≥ 98%		$16,113	$226	$15,887
Walnut Grove Elementary	Public	K-5	1999 Harvest Rd.	Pleasanton	94566	Alameda County	Pleasanton Unified	No	(n/a)	No	(n/a)	(925) 426-4250	629	23	26.8	5.1%	155 (24.6%)	6 (1.0%)	30 (4.8%)	385 (61.2%)	1 (0.2%)	0 (0.0%)	52 (8.3%)	98.1	57^th of 5817 public elementary schools	99.0%		97.8	87^th of 5857 public elementary schools	98.5%	30	78.5		78.5	83.3	83.7	86.8				84.7	90.6	84.6	85.1				86.5	≥ 98%		$15,739	$226	$15,513
Donlon Elementary	Public	K-5	4150 Dorman Rd.	Pleasanton	94588	Alameda County	Pleasanton Unified	No	(n/a)	No	(n/a)	(925) 426-4220	700	29	24.1	10.4%	107 (15.3%)	22 (3.1%)	58 (8.3%)	470 (67.1%)	1 (0.1%)	3 (0.4%)	39 (5.6%)	93.4	450^th of 5817 public elementary schools	92.3%		94.1	390^th of 5857 public elementary schools	93.3%	60	66.7		66.7	73.3	68.8	77.5				73.6	77.5	68.8	80.8				76.3	98%	0%	$15,768	$226	$15,542

Frequently Asked Questions about Harold William Kolb

Is Harold William Kolb a good school?

Yes! Harold William Kolb is one of the best elementary schools in the state. It ranks 49^th of 5817 California elementary schools.

What schools do graduates of Harold William Kolb attend?

Students who attend Harold William Kolb usually go on to attend:

Middle : Eleanor Murray Fallon
High : Dublin High

What is the racial makeup of Harold William Kolb?

Students at Harold William Kolb are 78% Asian, 8% White, 6% Hispanic, 5% Two or more races, 2% African American.

How many students attend Harold William Kolb?

In the 2024-25 school year, 696 students attended Harold William Kolb.

What district is Harold William Kolb in?

Dublin Unified

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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.