Bothell, WA sits on a geographic fault line that most buyers don't think about until they're already deep into their search - the city straddles two different counties. With a median home price around $1,100,000 as of mid-2026, buying a home in Bothell, WA is a significant financial decision, and you need to know exactly where you're looking before you write an offer.

The postal boundaries here matter more than in most cities. They determine your property taxes, your utility providers, and which county government you'll be dealing with. Whether you're eyeing something near the Sammamish River Trail or up in Canyon Park, the zip code you're in isn't just a mailing detail. This guide breaks down the specific codes, the county lines, and how the neighborhoods fall across the map.

The Primary Postal Codes for Bothell, WA

The United States Postal Service assigns four specific postal codes to the Bothell area. Three serve standard residential and commercial addresses; the fourth is reserved exclusively for Post Office boxes.

• 98011: Residential and commercial (King County side)
• 98012: Residential and commercial (Snohomish County side)
• 98021: Residential and commercial (Snohomish County side)
• 98041: P.O. Boxes only

These three residential codes cover a large footprint near the northeast end of Lake Washington. Because the city expanded over the decades, the boundaries don't perfectly align with the official municipal borders - something that trips up buyers more often than you'd expect.

The biggest dividing factor is the county line. Bothell spans both King County and Snohomish County, and the postal service routes mail along those county distinctions. That same split also shapes how local services reach residents on each side.

King County and Snohomish County Divisions

The 98011 code covers the King County side - the southern portion of the city, in the same county jurisdiction as Seattle and Bellevue. If you buy here, you're dealing with King County property tax assessments and King County government services.

The 98012 and 98021 codes are Snohomish County. That northern section borders deeper into the Eastside region. Residents there pay Snohomish County taxes and work with a different set of county officials, even though they share the same city name as their neighbors a few streets south.

Neighborhoods and Landmarks by Postal Area

Bothell has 13 officially recognized neighborhoods spread across its dual-county footprint. The most popular districts include Downtown/Riverfront, Canyon Park, North Creek, Norway Hill, Westhill, and Queensgate.

Those neighborhoods fall across all three residential codes. Buyers targeting the King County side will focus on 98011; those shopping the Snohomish County side will work within 98012 and 98021. Your daily commute and access to local amenities shift depending on which of those areas you land in - particularly for anyone driving toward Seattle or Bellevue on a regular basis.

Downtown and Riverfront Attractions

The downtown area anchors several well-known local landmarks. The Park at Bothell Landing houses the Bothell Historical Museum, and Blyth Park sits near the city center with substantial outdoor recreation space. The McMenamins Anderson School - a converted 1930s junior high school now operating as a hotel, theater, and saltwater pool - draws visitors from well outside the city. And the Sammamish River Trail runs through the area, giving residents across all three zip codes access to miles of paved paths for cyclists and pedestrians.

Area Codes and Nine-Digit Address Lookups

The primary telephone area code for Bothell is 425, which covers the Eastside region of the Seattle metropolitan area. Set up a new landline or a local business number and it'll almost certainly carry that prefix.

For official mortgage and title paperwork, you'll often need the full nine-digit postal code. The United States Postal Service uses the ZIP+4 system to identify specific delivery segments across the city.

Finding Your Full Nine-Digit Address

Those last four digits pinpoint a single block, an apartment building, or a large corporate office. You can find the exact ZIP+4 for any Bothell address through the official lookup tool on the postal service website - just enter the street address and city and it generates the full number on the spot.

Keep that full code handy. You'll need it when setting up utilities and finalizing mortgage applications, and it's one of those small details that holds up paperwork if you don't have it ready.

Real Estate Activity Across the City

Thirteen days. That's the median time a Bothell home spent on the market before going under contract in spring 2026. That number held across all three residential codes, regardless of county or neighborhood. If you're browsing casually, this market won't wait for you.

Inventory is tight. Recent data showed only about 156 homes available for sale across the 98011, 98012, and 98021 areas - a 2.9-month supply, well below the six months that would indicate a balanced market. The result: homes frequently sell above asking. The average sale-to-list ratio is around 100.7%, and over 26% of properties close above the seller's original list price. Build that into your budget before you start making offers.

Frequently Asked Questions

Which Bothell zip code includes the downtown area and Main Street?

It depends on the exact street address. The Downtown and Riverfront areas sit near the King County side of the city, which is primarily served by the 98011 code.

How do property taxes differ between Bothell zip codes in King County versus Snohomish County?

The county line is the entire story here. Homes in the 98011 area pay King County taxes; homes in the 98012 and 98021 areas pay Snohomish County taxes.

Does buying a house with a Bothell zip code guarantee the property is inside the official city limits?

No. A postal code doesn't confirm you're inside the municipal boundaries. Because Bothell spans both King County and Snohomish County, you'll want to verify the exact city limits with local tax authorities before you close.

Are there noticeable differences in median home prices between the 98011, 98012, and 98021 zip codes?

It varies by neighborhood, but the overall median sale price for the area is approximately $1,100,000 as of 2026. Homes in Norway Hill, Canyon Park, and other districts across all three codes move fast - averaging just 13 days on the market.

Which Bothell zip codes offer the most direct commute routes to Bellevue and Seattle?

The 98011 code puts you closest to both. It sits on the King County side near the northeast end of Lake Washington, which translates to a slightly shorter drive to Seattle and Bellevue than you'd get from the Snohomish County codes.