Mercer Island School District School Calendar 2025-2026
Mercer Island School District is a public school district in Washington serving 3,975 students. This page covers the 2025-2026 school year with day-level calendar data.
This district is part of the Seattle-Tacoma-Bellevue, WA metropolitan area.
3,975
Enrollment
184
School Days
29
Break Days
2025-2026
School Year
Calendar Summary
First Day of School
August 27, 2025
Last Day of School
June 18, 2026
NCES District ID
5304980
State
Washington
Breaks & Holidays
Scheduled breaks and holidays for Mercer Island School District during 2025-2026 (excludes weekends and summer):
| Break | Start | End | Days |
|---|---|---|---|
| Labor Day (No School) | Sep 1 | Sep 1 | 1 |
| No School Students - Teacher Full Pd Day | Oct 10 | Oct 10 | 1 |
| First Quarter Ends (Mihs) | Nov 7 | Nov 7 | 1 |
| Veterans Day (No School) | Nov 11 | Nov 11 | 1 |
| Elem. Students (No School) - Elem. Conferences | Nov 24 | Nov 24 | 1 |
| First Trimester Ends (Ims/Elem.) | Nov 26 | Nov 26 | 1 |
| Thanksgiving Day (No School) | Nov 27 | Nov 27 | 1 |
| Native American Heritage Day (No School) | Nov 28 | Nov 28 | 1 |
| School Resumes | Jan 6 | Jan 6 | 1 |
| Martin Luther King Jr. Day (No School) | Jan 19 | Jan 19 | 1 |
| Second Quarter Ends (Mihs) | Jan 23 | Jan 23 | 1 |
| No School Students - Prof. Development | Jan 26 | Jan 26 | 1 |
| Presidents' Day (No School) | Feb 16 | Feb 16 | 1 |
| Winter Break | Feb 17 | Feb 20 | 4 |
| Second Trimester Ends (Ims/Elem.) | Mar 19 | Mar 19 | 1 |
| No School Students | Mar 20 | Mar 20 | 1 |
| Third Quarter Ends (Mihs) | Mar 23 | Mar 23 | 1 |
| Scheduled Weather Makeup Day | Apr 10 | Apr 10 | 1 |
| Spring Break | Apr 13 | Apr 17 | 5 |
| Scheduled Weather Makeup Day | May 22 | May 22 | 1 |
| Memorial Day (No School) | May 25 | May 25 | 1 |
| Juneteenth (No School For Students Or Staff) | Jun 19 | Jun 19 | 1 |
School Year Calendar
Visual calendar for Mercer Island School District, July 2025 through June 2026:
Jul 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 31 |
Aug 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Sep 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 |
Oct 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 | 31 |
Nov 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | |||||
| 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 24 | 25 | 26 | 27 | 28 | 29 | 30 |
Dec 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 | 31 |
Jan 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |||
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 |
Feb 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 |
Mar 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| 30 | 31 |
Apr 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 |
May 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Jun 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 |
In SessionBreak/HolidayWeekend
Multi-Year Comparison
Calendar data across school years for Mercer Island School District:
| School Year | First Day | Last Day | School Days | Break Days |
|---|---|---|---|---|
| 2024-2025 | Aug 28 | Jun 18 | 154 | 74 |
| 2025-2026 | Aug 27 | Jun 18 | 184 | 29 |
| 2026-2027 | Sep 2 | May 27 | 192 | 0 |
Want This Data in Your Pipeline?
Get day-level calendar data for Mercer Island School District and 13,700+ districts via API. $99/mo for full access.
Get API Access →