Elementary Schools in Mercer Island School District

Summary:

The Mercer Island School District is home to four high-performing elementary schools (grades K-5) serving a suburban community, with the district itself ranked #1 in Washington state.

All four schools—West Mercer Elementary, Lakeridge Elementary School, Northwood Elementary School, and Island Park Elementary—consistently earn 5-star ratings and dramatically outperform state averages in test scores. Island Park Elementary currently holds the top rank at 10th in the state, followed closely by Lakeridge Elementary School at 11th, with both showing remarkable stability. West Mercer Elementary is a standout for science proficiency, while Northwood Elementary School has experienced some recent ranking fluctuation despite having the highest per-student spending in the group.

Key strengths across the district include exceptional science instruction and strong growth in English Language Arts by 5th grade. The schools share very low rates of economic disadvantage, which provides important context for the district's overall high achievement. While Northwood Elementary School's lower scores, particularly in 3rd grade ELA, highlight how performance can vary even within an elite district, parents can be confident that all Mercer Island elementary schools offer a consistently outstanding education.

District Detail

4160 86th Ave SE
Mercer Island, WA 98040-4196

(206) 236-3300

SchoolDigger Rank:
1^st of 247 Washington districts

See the 2025 Washington District rankings!

Grades served: PK, KG-12
Students: 3,993

Primary Schools: 4
Middle Schools: 1
High Schools: 1
Alternative Schools: 0

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 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	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
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.