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Best Elementary Schools in Zip Code 98040

At a glance

Schools

1,594

Students

5-star schools

Top rankedLakeridge Elementary School4^th of 1,138 Washington elementary schools

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Biggest riser

Northwood Elementary School up 53 spots statewide this year

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Summary:

ZIP code 98040 on Mercer Island has four public elementary schools serving primarily grades K–5, with Northwood also offering prekindergarten. All belong to the highly ranked Mercer Island School District, ranked first among 238 Washington districts. Together, the schools enroll 1,594 students and provide an unusually strong group of elementary options in a high-performing suburban community.

Lakeridge Elementary School has the strongest current academic profile, ranking fourth statewide for 2025–2026 and posting the highest reported proficiency in both English language arts (91.35%) and math (88.39%). Island Park Elementary ranks ninth statewide and is especially balanced, exceeding district results in ELA, math, and science. It has also remained in the statewide top 10 across the three displayed ranking years. West Mercer Elementary ranks highly over time and stands out for math, with 86.54% proficiency overall and the group’s strongest reported fourth-grade math result at 88.16%.

Northwood Elementary School remains a strong school by statewide standards, ranking 59th out of 1,138 schools, but its current ELA and math results—72.73% and 75.14%—trail the other three local schools. Its science performance is stronger at 84.91%, while fourth-grade ELA and math results are notably lower than its reported results in other grades. Across the area, family considerations include school size, grade-level performance, staffing ratios, and year-to-year changes. Assessment values marked as suppressed are unavailable, not zero; overall, 98040 offers four highly regarded schools, with Lakeridge, Island Park, and West Mercer generally leading on current achievement measures.

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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 (2026)				Ranking (2025)				WCAS Science (2026)		SBAC English Language Arts (2026)				SBAC Math (2026)				% 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/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	WCAS Science 5th 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 All Grades	SBAC Math 3rd Grade	SBAC Math 4th Grade	SBAC Math 5th 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%)	98.2	9^th of 1138 public elementary schools	99.2%		98	10^th of 1160 public elementary schools	99.1%	1	87.8	87.8		83.8	91.9	88.9		79.7	82.4	83.6	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%)	98.9	4^th of 1138 public elementary schools	99.6%		97.9	11^th of 1160 public elementary schools	99.1%	7				88.6		91.4		86.4	84.2	88.4	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
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%)								(n/a)				86.5		85.8		88.2		86.5	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%)	94.7	59^th of 1138 public elementary schools	94.8%		89.9	112^th of 1160 public elementary schools	90.3%	53	84.9	84.9	73.2	65.4	79.3	72.7	81.9	64.3	77.4	75.1	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

Cities Near Zip Code 98040

City	Distance	# of Schools	Statewide Rank
Mercer Island	0.56 mi	6	2^nd
Bellevue	2.18 mi	31	32^nd
Seattle	2.33 mi	135	89^th
Newcastle	2.53 mi	3	24^th
Renton	3.51 mi	38	108^th

See the top WA Washington cities

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.