Is Mercer Island High School a good school?

Yes! Mercer Island High School is one of the best high schools in the state. It ranks 3 rd of 437 Washington high schools.

How many students attend Mercer Island High School?

In the 2023-24 school year, 1,465 students attended Mercer Island High School.

What is the racial makeup of Mercer Island High School?

Students at Mercer Island High School are 53% White, 25% Asian, 13% Two or more races, 7% Hispanic, 1% African American.

What schools feed into Mercer Island High School?

Mercer Island High School is fed by the following schools: Elementary : Island Park Elementary Elementary : Lakeridge Elementary School Elementary : Northwood Elementary School Elementary : West Mercer Elementary Middle : Islander Middle School

Mercer Island High School

Summary:

Mercer Island High School is a public high school serving 1,524 students in grades 9-12 in the highly-ranked Mercer Island School District, which is ranked 1 out of 247 districts in Washington state and has a 5-star rating from SchoolDigger.

Mercer Island High School consistently ranks among the top high schools in Washington, ranking 3rd out of 437 high schools in the state for the 2023-2024 school year. This is reflected in its exceptional test scores, with 93.17% of 10th-grade students proficient or better in SBAC/English Language Arts and 86.98% proficient or better in SBAC/Math, significantly higher than the state averages. The school also maintains a consistently high four-year graduation rate, ranging from 92.3% to 94.8% over the past five years, well above the state average. Despite its high academic performance, Mercer Island High School has a relatively diverse student population, with a significant representation of Asian and multi-racial students.

Mercer Island High School's strong performance across various student subgroups suggests that it is able to provide an equitable educational experience and support the success of students from diverse backgrounds. The school's higher spending per student compared to the state average may contribute to its ability to provide a high-quality educational experience. While Mercer Island High School outperforms many of the nearby schools, such as International School and Newport Senior High School, which also demonstrate strong academic performance and high rankings, Mercer Island High School stands out as an exceptional high school that consistently delivers outstanding results.

Detail:

Public 9-12

9100 SE 42nd
Mercer Island, WA 98040-4199

(206) 236-3345

District: Mercer Island School District

SchoolDigger Rank:
3^rd of 437 Washington High Schools

Per Pupil Expenditures: $17,878

Feeder schools for Mercer Island High School:

Elementary:	Island Park Elementary
	Lakeridge Elementary School
	Northwood Elementary School
	West Mercer Elementary
Middle:	Islander Middle School

Student/teacher ratio: 19.6

Number of students: 1,465

Racial breakdown:

White:

53.2%

Asian:

24.8%

Two or more races:

12.8%

Free/discounted lunch recipients: 7.2%

See top rated Washington high schools

Compare Mercer Island High School to nearby high schools!

Performance Trends

Compare Details Mercer Island High School ranks better than 99.3% of high schools in Washington. (See more...)

Compare Details In 2024 the calculated Average Standard Score was 98.4. (See more...)

The four-year cohort graduation rate measures the percentage of students at Mercer Island High School who earn a standard high school diploma within four years of starting ninth grade.

The high school dropout rate measures the percentage of students who do not complete their high school education.

Student Body

Compare Details Student population at Mercer Island High School is diverse. Racial makeup is: White (53.2%), Asian (24.8%), two or more races (12.8%). (See more...)

Compare Details 7.2% of students are receiving a free or discounted lunch. (See more...)

Compare Details (See more...)

Teachers

Compare Details The student/teacher ratio at Mercer Island High School is 19.6. (See more...)

Compare Mercer Island High School employs 74.6 full-time teachers.

Finance

Compare Details The average total spent per student at Mercer Island High School is $17,878.

Schooldigger 2024 Rankings:

Mercer Island High School:

SchoolDigger ranks Mercer Island High School 3^rd of 437 Washington public high schools. (See Mercer Island High School in the ranking list.)

High School Test Score Ratings by Student Subgroup:

Multi-racial students:

Special Education students:

Low Socio Economic Status students:

Female students:

Male students:

Asian students:

Hispanic students:

White students:

Mercer Island School District:

SchoolDigger ranks Mercer Island School District 1^st of 247 Washington school districts. (See district ranking list.)

Average Rating:

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Rank History for Mercer Island High School

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Rank History for all students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2004	97.26	4^th	390	99.0%
2005	95.80	4^th	394	99.0%
2006	93.36	7^th	395	98.2%
2007	91.21	9^th	399	97.7%
2008	90.74	12^th	396	97.0%
2009	89.48	13^th	402	96.8%
2010	92.87	12^th	423	97.2%
2011	86.33	9^th	440	98.0%
2012	83.53	10^th	450	97.8%
2013	79.68	25^th	454	94.5%
2015	47.55	164^th	341	51.9%
2016	91.91	7^th	306	97.7%
2017	79.49	48^th	301	84.1%
2018	87.61	20^th	315	93.7%
2019	97.49	6^th	417	98.6%
2021	97.68	6^th	455	98.7%
2022	96.94	6^th	434	98.6%
2023	98.17	5^th	442	98.9%
2024	98.40	3^rd	437	99.3%

See the entire list of Washington High School Rankings!

Rank History for Multi-racial students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2018	82.10	13^th	91	85.7%
2019	92.51	8^th	163	95.1%
2021	97.69	1^st	195	99.5%
2022	95.39	3^rd	179	98.3%
2023	98.12	1^st	166	99.4%
2024	96.00	2^nd	161	98.8%

See the entire list of Best Washington High Schools for Multi-racial Students!

Rank History for Special Education students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2018	99.72	1^st	139	99.3%
2019	99.98	1^st	128	99.2%
2021	81.07	14^th	212	93.4%
2022	99.63	1^st	130	99.2%
2023	93.10	10^th	110	90.9%
2024	97.71	3^rd	110	97.3%

See the entire list of Best Washington High Schools for Special Education Students!

Rank History for Low Socio Economic Status students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2021	93.81	9^th	392	97.7%
2022	97.16	4^th	370	98.9%
2023	97.93	6^th	362	98.3%
2024	99.14	3^rd	356	99.2%

See the entire list of Best Washington High Schools for Low Socio Economic Status Students!

Rank History for Female students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2018	85.88	20^th	243	91.8%
2019	96.92	5^th	358	98.6%
2021	97.86	5^th	390	98.7%
2022	95.41	10^th	368	97.3%
2023	97.53	5^th	357	98.6%
2024	98.09	4^th	347	98.8%

See the entire list of Best Washington High Schools for Female Students!

Rank History for Male students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2018	87.52	13^th	254	94.9%
2019	97.84	4^th	355	98.9%
2021	97.28	5^th	395	98.7%
2022	97.77	3^rd	363	99.2%
2023	98.69	3^rd	358	99.2%
2024	98.60	3^rd	362	99.2%

See the entire list of Best Washington High Schools for Male Students!

Rank History for Asian students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2018	78.00	16^th	87	81.6%
2019	95.44	2^nd	121	98.3%
2021	90.14	8^th	136	94.1%
2022	90.18	11^th	124	91.1%
2023	89.47	14^th	118	88.1%
2024	91.30	7^th	113	93.8%

See the entire list of Best Washington High Schools for Asian Students!

Rank History for Hispanic students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2021	99.85	1^st	278	99.6%
2022	94.54	11^th	261	95.8%
2023	99.83	1^st	249	99.6%
2024	100.00	1^st	248	99.6%

See the entire list of Best Washington High Schools for Hispanic Students!

Rank History for White students at Mercer Island High School

Year	Avg Standard Score	Statewide Rank	Total # Ranked High Schools	WA State Percentile
2018	81.92	30^th	222	86.5%
2019	95.22	6^th	382	98.4%
2021	95.65	8^th	413	98.1%
2022	94.73	7^th	390	98.2%
2023	97.05	3^rd	379	99.2%
2024	97.85	2^nd	374	99.5%

See the entire list of Best Washington High Schools for White Students!

Data source: test scores: Washington Office of Superindentent of Public Instruction, rankings: SchoolDigger.com

As you review the school rankings data, please be aware that some of the information from certain demographics is missing. The reason for this omission is that the data has been redacted from the source data itself due to low population samples in these specific demographic groups.

Redacting data from low population samples is a necessary step to ensure the reliability and accuracy of the results, as small sample sizes may not be representative of the broader population. Additionally, this measure helps protect the privacy of individuals belonging to these demographic groups.

Data source: Washington State Office of Superintendent of Public Instruction

Review counts

All ratings (Avg rating: 5)

100%

Reviews:
No reviews have been submitted!

Enrollment information for Mercer Island High School

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Year	White	African American	Asian	Hispanic	American Indian	Pacific Islander	Two or More Races	Not Specified	Total
1988	1104	19	109	6	2	n/a	n/a	0	1240
1989	1024	15	118	6	2	n/a	n/a	0	1165
1990	954	18	135	5	2	n/a	n/a	0	1114
1991	854	21	140	7	2	n/a	n/a	0	1024
1992	819	21	146	10	1	n/a	n/a	0	997
1993	869	29	139	15	0	n/a	n/a	0	1052
1994	943	26	139	21	3	n/a	n/a	0	1132
1995	891	28	149	7	0	n/a	n/a	0	1075
1996	891	28	149	7	0	n/a	n/a	0	1075
1997	972	23	178	18	0	n/a	n/a	0	1191
1998	1028	28	201	14	1	n/a	n/a	0	1272
1999	1055	27	206	14	2	n/a	n/a	0	1304
2000	1100	26	223	19	2	n/a	n/a	0	1370
2001	1127	30	235	19	2	n/a	n/a	0	1413
2002	1081	23	256	25	3	n/a	n/a	0	1388
2003	1081	23	256	25	3	n/a	n/a	0	1388
2004	1086	25	250	32	2	n/a	n/a	0	1395
2005	1144	23	261	35	3	n/a	n/a	0	1466
2006	1137	18	271	32	2	n/a	n/a	0	1460
2007	1128	15	251	28	2	n/a	n/a	0	1424
2008	1091	17	255	30	1	n/a	n/a	0	1394
2009	1051	18	270	32	2	n/a	n/a	17	1390
2010	1084	21	278	30	4	n/a	n/a	16	1433
2011	1063	22	293	36	6	4	8	0	1432
2012	1056	16	303	45	9	4	20	0	1453
2013	1073	21	289	42	6	2	23	0	1456
2014	993	23	279	46	7	2	34	0	1384
2015	1003	24	292	54	6	2	35	0	1416
2016	1023	20	302	54	7	3	55	0	1464
2017	1030	15	304	60	8	2	81	0	1500
2018	1059	13	298	59	5	1	86	0	1521
2019	1055	19	303	58	2	4	108	3	1552
2020	1048	16	296	50	1	6	124	3	1544
2021	1028	14	313	54	0	4	136	2	1551
2022	901	28	346	92	0	6	166	5	1544
2023	864	18	369	98	0	3	162	10	1524
2024	780	20	363	96	1	4	188	13	1465

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Enrollment/Ethnicity

For more information about how the Department of Education defines ethnicity, see Defining Race and Ethnicity Data, National Center for Education Statistics

Students eligible for free or discounted lunch at Mercer Island High School

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Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1988	1240	59.0	21.0	0
1989	1165	55.0	21.1	n/a
1990	1114	55.7	20.0	0
1991	1024	46.8	21.8	n/a
1992	997	53.3	18.7	n/a
1993	1052	48.6	21.6	n/a
1994	1132	51.3	22.1	n/a
1995	1075	52.2	20.6	n/a
1996	1075	52.2	20.6	n/a
1997	1191	53.9	22.1	n/a
1998	1272	58.8	21.6	n/a
1999	1304	62.0	21.0	n/a
2000	1370	64.7	21.2	n/a
2001	1413	66.2	21.3	n/a
2002	1388	62.5	22.2	n/a
2003	1388	62.5	22.2	n/a
2004	1395	65.0	21.5	n/a
2005	1466	64.6	22.7	0
2006	1460	67.2	21.7	0
2007	1424	67.6	21.1	0
2008	1394	67.9	20.5	0
2009	1390	67.9	20.5	n/a
2010	1433	63.4	22.5	n/a
2011	1432	63.5	22.5	2.7
2012	1453	63.9	22.7	4.1
2013	1456	69.4	20.9	3.7
2014	1384	n/a	n/a	4
2015	1416	70.0	20.2	4.5
2016	1464	72.0	20.3	4
2017	1500	71.6	20.9	3.4
2018	1521	75.6	20.1	3.2
2019	1552	77.4	20.0	3.7
2020	1544	74.0	20.8	3.4
2021	1551	74.5	20.8	3.5
2022	1544	76.9	20.0	3.8
2023	1524	74.5	20.4	6.5
2024	1465	74.6	19.6	7.2

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Students eligible for discounted/free lunch:

The National School Lunch Program (NSLP) provides low-cost or free meals to students in U.S. public and nonprofit private schools based on household income. Those with incomes below 130% of the poverty line receive free lunch, while those between 130% and 185% qualify for reduced-price lunch. The percentage of students receiving free or reduced-price lunch serves as a marker for poverty, as it reflects the socioeconomic status of families in a given school or district. A higher FRPL rate typically indicates a higher concentration of low-income families, suggesting that the school or district may face additional challenges in providing adequate resources and support for student success.

Student/Teacher Ratio Mercer Island High School

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Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1988	1240	59.0	21.0	0
1989	1165	55.0	21.1	n/a
1990	1114	55.7	20.0	0
1991	1024	46.8	21.8	n/a
1992	997	53.3	18.7	n/a
1993	1052	48.6	21.6	n/a
1994	1132	51.3	22.1	n/a
1995	1075	52.2	20.6	n/a
1996	1075	52.2	20.6	n/a
1997	1191	53.9	22.1	n/a
1998	1272	58.8	21.6	n/a
1999	1304	62.0	21.0	n/a
2000	1370	64.7	21.2	n/a
2001	1413	66.2	21.3	n/a
2002	1388	62.5	22.2	n/a
2003	1388	62.5	22.2	n/a
2004	1395	65.0	21.5	n/a
2005	1466	64.6	22.7	0
2006	1460	67.2	21.7	0
2007	1424	67.6	21.1	0
2008	1394	67.9	20.5	0
2009	1390	67.9	20.5	n/a
2010	1433	63.4	22.5	n/a
2011	1432	63.5	22.5	2.7
2012	1453	63.9	22.7	4.1
2013	1456	69.4	20.9	3.7
2014	1384	n/a	n/a	4
2015	1416	70.0	20.2	4.5
2016	1464	72.0	20.3	4
2017	1500	71.6	20.9	3.4
2018	1521	75.6	20.1	3.2
2019	1552	77.4	20.0	3.7
2020	1544	74.0	20.8	3.4
2021	1551	74.5	20.8	3.5
2022	1544	76.9	20.0	3.8
2023	1524	74.5	20.4	6.5
2024	1465	74.6	19.6	7.2

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Student-Teacher Ratio

Student/teacher ratio is calculated by dividing the total number of students by the total number of full-time equivalent teachers. Please note that a smaller student/teacher ratio does not necessarily translate to smaller class size. In some instances, schools hire teachers part time, and some teachers are hired for specialized instruction with very small class sizes. These and other factors contribute to the student/teacher ratio. Note: For private schools, Student/teacher ratio may not include Pre-Kindergarten.

Immunization Rates