Enrollment
364
Elementary
DISTRICT 399 · STATE 380
SCHOOL COMMUNITY·MERCER ISLAND SCHOOL DISTRICT·NCES 530498000758
Island Park Elementary
5437 Island Crest Way, Mercer Island, WA 98040 · (206) 236-3410 · King County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL364 STUDENTS
A
allk12 Grade
Scored higher than 92% of Washington public elementary schools
- A+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- A-Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- CThree-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Washington public elementary schools
Student : Teacher
14.9:1
24 FTE teachers
DISTRICT 15.9:1 · STATE 17.3:1
Free / Reduced Lunch
2%
8 students
DISTRICT 6% · STATE 51%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Kindergarten | 43 | 12% |
| Grade 1 | 52 | 14% |
| Grade 2 | 63 | 17% |
| Grade 3 | 71 | 20% |
| Grade 4 | 77 | 21% |
| Grade 5 | 58 | 16% |
This year's kindergarten class (43) is 26% smaller than its 5th grade class (58).
Student demographics
61%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 66% · STATE 68% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
School pathway
Students here typically continue to
Based on grade levels within Mercer Island School District. Attendance zones can vary; confirm enrollment with the district.
Test scores
Smarter Balanced + WCAS 2024-25 . % Met or Exceeded StandardEnglish Language Arts
85.4%
WA avg 58.4% . -0.1pp since 2014
Math
86.4%
WA avg 51.2% . +2.7pp since 2014
What this means: On the Smarter Balanced + WCAS, Washington's statewide test, about 85 of every 100 students at this school read and write at grade level and about 86 of 100 do math at grade level. Across all Washington schools, those numbers are about 58 and 51. Reading and writing scores have held steady since 2014, while math scores are up about 3 points.
Smarter Balanced + WCAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 85.4% | 86.4% |
| 2023-24 | 91.0% | 88.3% |
| 2022-23 | 91.6% | 89.0% |
| 2021-22 | 88.3% | 86.8% |
| 2018-19 | 83.8% | 81.9% |
| 2017-18 | 82.1% | 82.0% |
| 2016-17 | 84.7% | 83.7% |
| 2015-16 | 79.8% | 80.2% |
| 2014-15 | 85.5% | 83.8% |
% Met or Exceeded Standard, all students and all tested grades.
Source: Smarter Balanced + WCAS. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
88.0%
composite math + reading, all grades
Predicted
78.7%
based on WA schools with similar FRL share
Beats by
+9.3pp
above demographic expectation
What this means: About 88% of students here test proficient in math and reading, compared with the roughly 79% typical for Washington schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Washington's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Island Park Elementary
Island Park Elementary's state test result (88.0% proficient) is higher than 5 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Island Park Elementary this school | 364 | 2.2% | 88.0% |
| Carl Sandburg Elementary Kirkland | 391 | 8.7% | 74.1% |
| Laura Ingalls Wilder Elementary Woodinville | 315 | 4.1% | 82.5% |
| Bryant Elementary School SEATTLE | 470 | 5.3% | 80.4% |
| Totem Falls Snohomish | 412 | 10.9% | 71.4% |
| Cascade View Elementary School Snoqualmie | 493 | 3.4% | 83.4% |
Matched among Washington elementary schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Island Park Elementary ranks
Among elementary schools| Measure | This school | In Washington | In King County |
|---|---|---|---|
| State test proficiency ranked highest first | 88.0% | #10 of 936 | #9 of 280 |
| Math proficiency ranked highest first | 86.4% | #17 of 1,103 ▼ 2 | #16 of 281 ▼ 3 |
| Reading proficiency ranked highest first | 85.4% | #20 of 1,102 ▼ 13 | #17 of 280 ▼ 11 |
| 3-year test score change ranked biggest drop first | -1.6pp | #298 of 928 | #96 of 274 |
| Enrollment ranked largest first | 364 | #761 of 1,268 | #211 of 299 |
| Students per teacher ranked fewest first | 14.9:1 | #316 of 1,085 | #73 of 280 |
| Diversity index ranked most diverse first | 61.4% | #494 of 1,088 | #214 of 281 |
| Free and reduced lunch ranked highest share first | 2.2% | #1,168 of 1,169 | #291 of 292 |
| Enrollment change since 2017-18 ranked steepest decline first | -13.3% | #490 of 778 | #151 of 220 |
Ranked against other public elementary schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
364
-2 (-1%) vs 2020
-21% since 1990-91, when it was 461
Student : Teacher
14.9:1
was 14.6:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 364 | 24.4 | 14.9:1 | 2% (8) |
| 2023-24 | 361 | 22.8 | 15.8:1 | 2% (7) |
| 2022-23 | 380 | 23.1 | 16.5:1 | 1% (5) |
| 2020-21 | 366 | 25 | 14.6:1 | 2% (7) |
| 2017-18 | 420 | 25.4 | 16.5:1 | 1% (4) |
| 2015-16 | 556 | 29 | 19.2:1 | 5% (26) |
| 2010-11 | 553 | 29 | 19.1:1 | 5% (25) |
| 2000-01 | 572 | 28 | 20.4:1 | N/A |
| 1990-91 | 461 | 17 | 27.1:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Island Park Elementary.
Since 2017-18: students down 13% (420 to 364); teachers down 4% (25.4 to 24.4).
About Island Park Elementary
Island Park Elementary is a mid-sized elementary school located in Mercer Island, Washington. Enrollment stands at 364 students, covering kindergarten through 5.
Mercer Island School District runs Island Park Elementary along with 5 other schools, enrolling 3,993 students in total.
More than half of the students at Island Park Elementary are White (56%). The next largest groups are 20% Asian, 17% multiracial, and 7% Hispanic. That is in line with King County, where about 55% of residents are White. On the diversity index, which measures the chance that two random students are from different groups, Island Park Elementary scores 61%.
Island Park Elementary reports a ratio of 14.9 students per teacher, from 24.4 full-time-equivalent teachers. By comparison, the average for elementary schools in Washington is 17.3:1. Student poverty is often measured by lunch eligibility; at Island Park Elementary, 2% qualify for free or reduced-price lunch. The rate at public schools in King County averages 38%, higher than here.
Island Park Elementary earns an A on the allk12 Grade, which blends test scores, results against poverty-based expectations, and the three-year trend. It scored higher than 92% of Washington public elementary schools.
After adjusting for student poverty, Island Park Elementary lands between the top and bottom 10% of Washington schools. Its average proficiency rate across its state test results is 88.0%; the prediction is 78.7%.
In King County, where the school is located, median household income comes to about $124,746, the share of adults with a bachelor's degree or higher is 57%, and roughly 5% of residents are in poverty. The county has 544 public schools and about 278,492 students.
Islander Middle School, about 1.2 miles away, is the closest public school. Counting only straight-line distance, at least 8 other public schools are within five miles. Of the 9 nearby schools with scores, including this one, Island Park Elementary is 1st on average proficiency.
Island Park Elementary is coded as Suburb: Large in federal locale data.
In 2020-21, Island Park Elementary enrolled 366; in 2024-25, 364.
You can use this page to share news and ask questions about fundraisers, report cards, and school supplies. You can also rate the school on this page.
King County at a glance
View full county profilePopulation
2,287,171
Census ACS
Median income
$124,746
Household, ACS
Bachelor's+
57%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
544
278,492 students
Quick facts
Related schools
Other schools in Mercer Island School District
- Mercer Island High SchoolHigh · 1,439 students
- Islander Middle SchoolMiddle · 960 students
- West Mercer ElementaryElementary · 431 students
- Lakeridge Elementary SchoolElementary · 401 students
- Northwood Elementary SchoolElementary · 398 students
Other schools in Mercer Island
- Mercer Island High SchoolHigh · 1,439 students
- Islander Middle SchoolMiddle · 960 students
- West Mercer ElementaryElementary · 431 students
- Lakeridge Elementary SchoolElementary · 401 students
- Northwood Elementary SchoolElementary · 398 students
Nearby schools
- Islander Middle School1.2 mi · 960
- Mercer Island High School1.3 mi · 1,439
- West Mercer Elementary1.3 mi · 431
- Northwood Elementary School1.4 mi · 398
- Lakeridge Elementary School1.5 mi · 401
- Newport Heights Elementary2.0 mi · 549
Frequently asked questions
About Island Park ElementaryHow many students attend Island Park Elementary?
Island Park Elementary enrolls approximately 364 students in grades KG-05.
Is Island Park Elementary an elementary, middle, or high school?
Island Park Elementary is an elementary school covering grades KG-05.
How many teachers does Island Park Elementary have?
Island Park Elementary employs 24 FTE teachers, for a student-to-teacher ratio of 14.9:1.
What is the student diversity at Island Park Elementary?
Student demographics at Island Park Elementary are roughly 56% White, 7% Hispanic, 0% Black, 20% Asian, 17% Two or more.
Who oversees Island Park Elementary?
Island Park Elementary is overseen by Mercer Island School District in King County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.