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Mercer Island School District

At a glance

1^stof 247 Washington districts

Better than 99% of Washington districts

Elementary 4 Middle 1 High 1Grades PK, KG-12

4160 86th Ave SE
Mercer Island, WA 98040-4196·(206) 236-3300·All Washington district rankings →

Statewide performance 2017–2025

2025: better than 99.6% of districts

Schools

3,993

Students

5-star schools

Top rankedMercer Island High School4^th of 438 Washington high schools

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Biggest riser

Islander Middle School up 6 spots statewide this year

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Smallest classes

Island Park Elementary 14.9 students per teacher

SchoolDigger ratings

5★

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

Summary:

The Mercer Island School District is a top-ranked system of six schools serving grades K-12 on an affluent island community in Washington, with all schools earning 5-star ratings. This district is renowned for its exceptional and consistent academic performance, ranking #1 out of 247 districts in the state, which means every school here performs well above state averages in English, math, and science.

When comparing schools within the district, Mercer Island High School stands out as a state leader, ranked #4, with a remarkable 96% graduation rate. Among elementary schools, Island Park Elementary and Lakeridge Elementary are consistently top-ranked, while West Mercer Elementary also performs in the top 2% statewide. Islander Middle School holds a strong #13 ranking, demonstrating the district's excellence continues through middle grades.

An interesting finding is that higher spending does not always correlate with higher rank here; for example, Northwood Elementary has the highest per-student spending but the lowest rank within the district, though it is still a high-performing school overall. The district's success is characterized by stable, high achievement across all grade levels, with particular strengths in science at the high school and mathematics in elementary grades, providing a consistently excellent educational pipeline from kindergarten through graduation.

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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 Immunizations Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				WCAS Science (2025)				SBAC English Language Arts (2025)								SBAC Math (2025)								% Completely Immunized (2024)	% Polio (2024)	% Measles (2024)	% Mumps (2024)	% Rubella (2024)	% Diphtheria (2024)	% Hepatitis B (2024)	% Varicella (2024)	% Pertussis (2024)	% Tetanus (2024)	Per Pupil Expenditures (2024)
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	WCAS Science 5th Grade	WCAS Science 8th Grade	WCAS Science 11th Grade	WCAS Science All Grades	SBAC English Language Arts 3rd Grade	SBAC English Language Arts 4th Grade	SBAC English Language Arts 5th Grade	SBAC English Language Arts 6th Grade	SBAC English Language Arts 7th Grade	SBAC English Language Arts 8th Grade	SBAC English Language Arts 10th Grade	SBAC English Language Arts All Grades	SBAC Math 3rd Grade	SBAC Math 4th Grade	SBAC Math 5th Grade	SBAC Math 6th Grade	SBAC Math 7th Grade	SBAC Math 8th Grade	SBAC Math 10th Grade	SBAC Math All Grades	% Completely Immunized KG	% Polio KG	% Measles KG	% Mumps KG	% Rubella KG	% Diphtheria KG	% Hepatitis B KG	% Varicella KG	% Pertussis KG	% Tetanus KG	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Island Park Elementary	Public	K-5	5437 Island Crest Way	Mercer Island	98040	King County	Mercer Island School District	No	No	No	No	(206) 236-3410	364	24	14.9	2.2%	203 (55.8%)	1 (0.3%)	25 (6.9%)	73 (20.1%)	0 (0.0%)	0 (0.0%)	61 (16.8%)	98	10^th of 1160 public elementary schools	99.1%		98.5	7^th of 1168 public elementary schools	99.4%	3	90.9			90.9	82.2	86.5	96.3					87.6	86.3	87.8	89.3					87.7	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	$20,339	$439	$19,900
Lakeridge Elementary School	Public	K-5	8215 SE 78th	Mercer Island	98040	King County	Mercer Island School District	No	No	No	No	(206) 236-3415	401	23	17.1	3.5%	175 (43.6%)	3 (0.7%)	19 (4.7%)	118 (29.4%)	1 (0.2%)	0 (0.0%)	84 (20.9%)	97.9	11^th of 1160 public elementary schools	99.1%		98.1	11^th of 1168 public elementary schools	99.1%		86.6			86.6	91.5	87.0	88.5					88.9	89.0	91.3	82.1					87.7	97.4	100.0	97.4	97.4	97.4	100.0	100.0	100.0	100.0	100.0	$17,990	$264	$17,726
Mercer Island High School	Public	9-12	9100 SE 42nd	Mercer Island	98040	King County	Mercer Island School District	No	No	No	No	(206) 236-3345	1,439	76	18.8	7.1%	743 (51.6%)	20 (1.4%)	102 (7.1%)	362 (25.2%)	1 (0.1%)	5 (0.3%)	192 (13.3%)	98.8	4^th of 438 public high schools	99.1%		98.4	3^rd of 437 public high schools	99.3%	1			92.7	92.7							95.1	95.1							81.4	81.4											$19,890	$301	$19,589
Islander Middle School	Public	6-8	8225 SE 72nd	Mercer Island	98040	King County	Mercer Island School District	No	No	No	No	(206) 236-3413	960	45	21.3	7.8%	440 (45.8%)	9 (0.9%)	74 (7.7%)	306 (31.9%)	1 (0.1%)	0 (0.0%)	126 (13.1%)	97.2	13^th of 534 public middle schools	97.6%		96.2	19^th of 535 public middle schools	96.4%	6		75.0		75.0				84.8	78.1	83.8		82.1				78.9	79.0	76.7		78.2											$17,200	$267	$16,933
West Mercer Elementary	Public	K-5	4141 81st Ave SE	Mercer Island	98040	King County	Mercer Island School District	No	No	No	No	(206) 236-3430	431	26	16.4	7.9%	179 (41.5%)	12 (2.8%)	35 (8.1%)	140 (32.5%)	1 (0.2%)	0 (0.0%)	61 (14.2%)	96.7	24^th of 1160 public elementary schools	97.9%		96.9	22^nd of 1168 public elementary schools	98.1%	2	90.5			90.5	81.0	82.1	89.2					84.1	81.0	83.6	82.4					82.3	96.7	96.7	98.4	98.4	98.4	96.7	96.7	98.4	96.7	96.7	$19,811	$264	$19,547
Northwood Elementary School	Public	PK, KG-5	4030 86th Ave SE	Mercer Island	98040	King County	Mercer Island School District	No	No	No	Yes	(253) 841-8740	398	26	15.0	10.3%	183 (46.0%)	2 (0.5%)	40 (10.1%)	116 (29.1%)	0 (0.0%)	1 (0.3%)	53 (13.3%)	89.9	112^th of 1160 public elementary schools	90.3%		96.4	26^th of 1168 public elementary schools	97.8%	86	83.1			83.1	61.2	74.1	89.7					75.8	64.0	83.1	83.1					77.4	91.7	91.7	93.8	93.8	93.8	93.8	95.8	95.8	93.8	93.8	$21,645	$597	$21,048

Districts nearby

District	Distance	# of Schools	Statewide Rank
Bellevue School District	1.93 mi	30	17^th
Renton School District	1.99 mi	31	133^rd
Seattle School District No. 1	2.21 mi	108	45^th
Rainier Valley Leadership Academy	2.54 mi	1
Impact \| Salish Sea Elementary	3.03 mi	1	150^th

See the top WA Washington districts

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau, the Washington State Department of Health and the Washington Office of Superindentent of Public Instruction.

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.