Enrollment
401
Elementary
DISTRICT 399 · STATE 380
SCHOOL COMMUNITY·MERCER ISLAND SCHOOL DISTRICT·NCES 530498000759
Lakeridge Elementary School
8215 SE 78th, Mercer Island, WA 98040 · (206) 236-3415 · King County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL401 STUDENTS
A+
allk12 Grade
Scored higher than 95% 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.
- B-Three-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
17.2:1
23 FTE teachers
DISTRICT 15.9:1 · STATE 17.3:1
Free / Reduced Lunch
3%
14 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 | 45 | 11% |
| Grade 1 | 43 | 11% |
| Grade 2 | 56 | 14% |
| Grade 3 | 85 | 21% |
| Grade 4 | 92 | 23% |
| Grade 5 | 80 | 20% |
This year's kindergarten class (45) is 44% smaller than its 5th grade class (80).
Student demographics
68%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
88.2%
WA avg 58.4% . +2.3pp since 2014
Math
87.0%
WA avg 51.2% . +2.2pp since 2014
What this means: On the Smarter Balanced + WCAS, Washington's statewide test, about 88 of every 100 students at this school read and write at grade level and about 87 of 100 do math at grade level. Across all Washington schools, those numbers are about 58 and 51. Reading and writing scores are up about 2 points since 2014, while math scores are up about 2 points.
Smarter Balanced + WCAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 88.2% | 87.0% |
| 2023-24 | 91.3% | 84.5% |
| 2022-23 | 86.8% | 85.9% |
| 2021-22 | 87.3% | 84.3% |
| 2018-19 | 88.7% | 86.6% |
| 2017-18 | 90.3% | 87.5% |
| 2016-17 | 89.0% | 83.6% |
| 2015-16 | 85.8% | 80.3% |
| 2014-15 | 85.9% | 84.9% |
% 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
87.3%
composite math + reading, all grades
Predicted
77.9%
based on WA schools with similar FRL share
Beats by
+9.4pp
above demographic expectation
What this means: About 87% of students here test proficient in math and reading, compared with the roughly 78% 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 Lakeridge Elementary School
Lakeridge Elementary School's state test result (87.3% proficient) is higher than 3 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Lakeridge Elementary School this school | 401 | 3.5% | 87.3% |
| West Mercer Elementary Mercer Island | 431 | 7.9% | 84.5% |
| Northwood Elementary School Mercer Island | 398 | 10.3% | 79.0% |
| Laura Ingalls Wilder Elementary Woodinville | 315 | 4.1% | 82.5% |
| Island Park Elementary Mercer Island | 364 | 2.2% | 88.0% |
| Sunrise Elementary Redmond | 322 | 6.2% | 91.2% |
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 Lakeridge Elementary School ranks
Among elementary schools| Measure | This school | In Washington | In King County |
|---|---|---|---|
| State test proficiency ranked highest first | 87.3% | #12 of 936 | #11 of 280 |
| Math proficiency ranked highest first | 87.0% | #13 of 1,103 ▲ 9 | #12 of 281 ▲ 7 |
| Reading proficiency ranked highest first | 88.2% | #13 of 1,102 ▼ 7 | #13 of 280 ▼ 8 |
| 3-year test score change ranked biggest gain first | +1.8pp | #449 of 928 | #117 of 274 |
| Enrollment ranked largest first | 401 | #634 of 1,268 | #171 of 299 |
| Students per teacher ranked fewest first | 17.2:1 | #856 of 1,085 | #224 of 280 |
| Diversity index ranked most diverse first | 67.5% | #345 of 1,088 | #172 of 281 |
| Free and reduced lunch ranked highest share first | 3.5% | #1,164 of 1,169 | #287 of 292 |
| Enrollment change since 2017-18 ranked steepest decline first | -14.9% | #437 of 778 | #138 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
401
-3 (-1%) vs 2020
-24% since 1990-91, when it was 531
Student : Teacher
17.2:1
was 16.2:1
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 | 401 | 23.4 | 17.2:1 | 3% (14) |
| 2023-24 | 403 | 22 | 18.3:1 | 3% (12) |
| 2022-23 | 397 | 21.6 | 18.4:1 | 3% (13) |
| 2020-21 | 404 | 25 | 16.2:1 | 2% (7) |
| 2017-18 | 471 | 25.6 | 18.4:1 | 1% (3) |
| 2015-16 | 622 | 32 | 19.4:1 | 3% (16) |
| 2010-11 | 600 | 31 | 19.4:1 | 2% (12) |
| 2000-01 | 624 | 30 | 20.8:1 | N/A |
| 1990-91 | 531 | 25 | 21.2:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Lakeridge Elementary School.
Since 2017-18: students down 15% (471 to 401); teachers down 9% (25.6 to 23.4).
About Lakeridge Elementary School
Lakeridge Elementary School is a medium-sized elementary school in Mercer Island, Washington. It educates 401 students in kindergarten through 5.
The 6 schools in Mercer Island School District enroll 3,993 students altogether, Lakeridge Elementary School among them.
No single group makes up more than half of enrollment at Lakeridge Elementary School. The largest is White students, at 44%. Other students are 29% Asian, 21% multiracial, and 5% Hispanic. That is lower than the 55% White share among all King County residents. The school's diversity index is 68%, meaning two students picked at random have a 68% chance of belonging to different racial or ethnic groups.
Lakeridge Elementary School counts 23.4 full-time-equivalent teachers, about 17.2 students for each one. For comparison, elementary schools in Washington average 17.3:1. About 3% of enrolled students meet the income rules for free or reduced-price lunch. Public schools in King County average 38%.
allk12 grades Lakeridge Elementary School an A+. The grade compares the school only with Washington public elementary schools, because each state gives its own test.
Test results at Lakeridge Elementary School are 9.4 points above what its free or reduced-price lunch share predicts (87.3% actual, 77.9% predicted).
King County has these Census figures: the median household income is $124,746, about 57% of adults have at least a bachelor's degree, and roughly 5% of residents are in poverty. In all, King County has 544 public schools and roughly 278,492 students.
Nearby, Islander Middle School is about 0.4 miles away. Within five miles of Lakeridge Elementary School, there are at least 8 other public schools. Compared with its nearest neighbors, Lakeridge Elementary School ranks 2nd of 8 on average proficiency.
Lakeridge Elementary School falls in the Suburb: Large locale category, used for schools in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
There was little change in enrollment from 2020-21 (404) to 2024-25 (401). Over the same period, the student-to-teacher ratio rose to 17.2:1, from 16.2:1.
The discussion area below is open to posts about sports tryouts, band and choir, and theater. Questions from prospective families are welcome too.
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
- Northwood Elementary SchoolElementary · 398 students
- Island Park ElementaryElementary · 364 students
Other schools in Mercer Island
- Mercer Island High SchoolHigh · 1,439 students
- Islander Middle SchoolMiddle · 960 students
- West Mercer ElementaryElementary · 431 students
- Northwood Elementary SchoolElementary · 398 students
- Island Park ElementaryElementary · 364 students
Other Lakeridge Elementary schools
2 other US public schools in 2 states are named Lakeridge Elementary. Lakeridge Elementary School is the 2nd largest of the 3.
- Lakeridge Elementary SchoolSeattle, WA · 287 students
- Lakeridge Elementary SchoolCEDAR HILL, TX · 466 students
Nearby schools
- Islander Middle School0.4 mi · 960
- Island Park Elementary1.5 mi · 364
- Kennydale Elementary School1.8 mi · 511
- Rainier Beach High School1.8 mi · 854
- Emerson Elementary School1.9 mi · 398
- Middle College High School2.0 mi · 93
Frequently asked questions
About Lakeridge Elementary SchoolHow many students attend Lakeridge Elementary School?
Lakeridge Elementary School enrolls approximately 401 students in grades KG-05.
What grades does Lakeridge Elementary School serve?
Lakeridge Elementary School serves grades KG-05.
What is the student-teacher ratio at Lakeridge Elementary School?
The student-to-teacher ratio at Lakeridge Elementary School is approximately 17.2:1 (23 FTE teachers).
What is the student diversity at Lakeridge Elementary School?
Student demographics at Lakeridge Elementary School are roughly 44% White, 5% Hispanic, 1% Black, 29% Asian, 21% Two or more.
What district is Lakeridge Elementary School in?
Lakeridge Elementary School is part of Mercer Island School District.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.