Great Schools, Two Districts: How Education Works in Sammamish

Ask any Sammamish parent what drew them here and schools are almost always near the top of the list. What surprises a lot of newcomers is that “Sammamish schools” isn’t one system. Drive down 228th Avenue, the plateau’s main north-south corridor, and in about a mile you’ll pass two public high schools from two entirely different school districts, with a private school sitting right between them.

Two full-size districts, split down the middle

The Lake Washington School District (LWSD) serves the northern half of Sammamish, while the Issaquah School District (ISD) serves the south. Both are large, well-regarded districts in their own right, not small satellite systems built around Sammamish. LWSD is the second-largest school district in Washington State, serving roughly 31,000 students across Redmond, Kirkland, and Sammamish. ISD serves around 18,700 students across Sammamish, Issaquah, and parts of Bellevue and Renton, and ranks in the top 5% of Washington districts for overall performance. Both carry an A+ rating from Niche.

That’s the part worth sitting with: this isn’t one strong district and one weak one that the city happens to straddle. It’s two large, highly-rated districts that each treat a slice of Sammamish as a core part of their territory.

What that looks like on the ground

North Sammamish (LWSD): - Eastlake High School, located right on 228th Avenue NE in Sammamish - Renaissance School of Art and Reasoning, a small choice middle school housed on the Eastlake campus, plus Inglewood Middle School - Elementary schools serving the area include Elizabeth Blackwell, Rachel Carson, Christa McAuliffe, Margaret Mead, and Samantha Smith - Tesla STEM High School, LWSD’s selective, lottery-based STEM magnet, is technically located just across the city line in Redmond, but it’s a real option for Sammamish LWSD families since admission is district-wide by lottery, not by neighborhood zoning

South Sammamish (ISD): - Skyline High School, on 228th Avenue SE, about a mile south of Eastlake - Middle schools serving the area include Beaver Lake, Pacific Cascade, and Pine Lake - Elementary schools serving the area include Cascade Ridge, Cedar Trails, Challenger, Creekside, Discovery, Endeavour, and Sunny Hills

And in between the two comprehensive high schools sits Eastside Catholic, a private secondary school that relocated to Sammamish in 2008. It’s a genuinely unusual stretch of road: two full-size public high schools from different districts and a well-known private school, all within about a mile of each other.

Both flagship high schools perform well above state averages. Skyline consistently ranks in the top 3% of Washington high schools, with an IB program and strong graduation rates. Issaquah School District as a whole ranks in the top 5% of Washington districts across math, reading, science, and graduation rate.

The small pocket that’s neither

There’s one more wrinkle. A small area in the northeast corner of Sammamish, roughly 65 homes off 244th Avenue NE, actually falls into a third district: the Snoqualmie Valley School District, assigning those students to Fall City Elementary, Chief Kanim Middle School, and Mount Si High School. It’s a legacy of how boundaries were drawn long before the city incorporated, and it’s been a genuine point of friction locally: residents there have petitioned four separate times since 2003 to be moved into LWSD, since the neighborhood is surrounded on three sides by LWSD territory. The most recent petition was denied in late 2025, and as of early 2026 a group of parents is appealing that denial in King County Superior Court. It’s an active legal process, not a scheduled boundary change, so there’s no set timeline for how it resolves, but it’s worth knowing about if a specific address in that corner of the city matters to your decision.

Is this actually unusual for the Seattle area?

Sort of, and sort of not. Plenty of Eastside cities technically touch more than one district at their edges. Newcastle, for instance, has slivers in the Bellevue, Renton, and Issaquah districts. But most Eastside cities are still clearly anchored by one dominant district: Bellevue is essentially all Bellevue School District, Redmond and Kirkland are essentially all LWSD, and Issaquah proper is essentially all Issaquah School District.

What makes Sammamish different is the scale of the split. This isn’t a small edge case, it’s a genuine, roughly even division of a single city between two major, well-regarded districts, plus that small Snoqualmie Valley pocket on top. Among Eastside cities of a similar size, that kind of near 50/50 divide is more the exception than the rule.

Where the districts sit relative to each other

Schematic map showing the City of Sammamish split between the Lake Washington School District to the north and Issaquah School District to the south, divided roughly along SE 8th Street, with a small Snoqualmie Valley School District pocket in the northeast corner, and Eastlake High School, Eastside Catholic, and Skyline High School marked along the 228th Avenue corridor

A schematic look at how the two main districts divide the city, not an official boundary map. The real dividing line zigzags street by street rather than running perfectly straight, but this gives a sense of the geography: LWSD to the north, ISD to the south, roughly along SE 8th Street, with the small Snoqualmie Valley pocket tucked into the northeast corner.

For the real, address-level boundary, both districts publish official boundary lookup tools, and that’s always worth checking directly for any specific property:

• Lake Washington School District: lwsd.org/students-families/families/attendance-areas

• Issaquah School District: isd411.org/enrollment/whats-my-school

This is the third post in our Why Sammamish? series. Up next: getting outside, sports, trails, and everyday outdoor life on the plateau.

Kelly Azzarello Real Estate | Compass 📧 kelly@kellyazzarello.com 📞 (425) 830-6457 🌐 kellyazzarello.com