Issaquah, WA ZIP Codes
2 ZIP codes serve Issaquah, Washington: 98029 and 98027. Together they are home to 59,541 residents in 23,919 households. That is more than the 39,591 people counted inside Issaquah city limits, because these ZIP codes reach past its boundary. Median household income ranges from $153,301 in 98027 to $170,759 in 98029.
Issaquah city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 39,591 |
| Households | 16,664 |
| Median household income | $154,669 |
| Median home value | $963,000 |
| Median age | 37.5 |
| Median rent | $2,590 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 59,541 |
| Households (sum of ZIP codes) | 23,919 |
| Median household income, range across ZIP codes | $153,301 (98027) to $170,759 (98029) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $162,143 |
| Homeowners | 64.9% |
| Households with kids under 18 | 32.8% |
| Moved in the past year | 16.1% |
| Carrier routes in EDDM2GO's route library | 36 routes, 25,088 homes (2 of 2 ZIP codes) |
Top facts
- Highest median household income in Issaquah: 98029 ($170,759)
- Most residents: 98029 (30,586 people)
- Highest homeownership: 98027 (67.6% own their home)
- Most households with kids: 98029 (38.2% of households)
- Most new movers: 98027 (17.6% moved in last year)
- Youngest median age: 98029 (37.2 years)
- Highest median home value: 98029 ($1,063,200)
Every ZIP code in Issaquah
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 98029 | Issaquah | 30,586 | 12,115 | $170,759 | $1,063,200 | 62.3% | 38.2% | 14.6% | 16 | 12,900 | 39% of its land; mailing city |
| 98027 | Issaquah | 28,955 | 11,804 | $153,301 | $996,600 | 67.6% | 27.3% | 17.6% | 20 | 13,488 | 14% of its land; mailing city |
A ZIP code is listed for Issaquah when at least 10% of its land lies inside Issaquah city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Issaquah. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Issaquah.
Counties
- King County — 88 ZIP codes
Nearby cities sharing these ZIP codes
- Sammamish — 3 ZIP codes
- East Renton Highlands — 3 ZIP codes
Price a mailing to Issaquah ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Issaquah, WA?
- 98029 and 98027. A ZIP code is listed for Issaquah when at least 10% of its land lies inside Issaquah city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Issaquah.
- What is the population of Issaquah, WA?
- The Census Bureau counts 39,591 residents inside Issaquah city limits (ACS 2020–2024). The 2 ZIP codes that serve Issaquah hold 59,541 residents in all.
- What is the median household income in Issaquah, WA?
- $154,669 inside Issaquah city limits, per the Census Bureau. Across its ZIP codes the medians run from $153,301 to $170,759.
- Which Issaquah ZIP code has the highest median household income?
- 98029, at $170,759, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Issaquah, WA?
- For the 2 of 2 ZIP codes in EDDM2GO's stored route library: 36 carrier routes reaching 25,088 residential and 1,300 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.