ZIP 98043 vs ZIP 98155

Source:

Mountlake Terrace, WA — Seattle, WA

This side-by-side compares ZIP 98043 (Mountlake Terrace, WA) and ZIP 98155 (Seattle, WA) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 98043 has a population of 19,943 at 1,883 people per square mile, while ZIP 98155 has 32,778 at 1,675 per square mile. That difference in population size and density alone reshapes how every other metric should be interpreted — a higher-income ZIP with 1,200 residents behaves very differently from one with 45,000.

On income and education, ZIP 98043 reports a median household income of $107,687 against $131,540 in ZIP 98155, with per-capita income of $59,449 vs $67,259. The share of adults holding a bachelor's degree or higher is 42.9% in 98043 and 56.5% in 98155. Poverty rate reads 7.0% vs 6.1%, and unemployment 4.2% vs 4.8% — these four fields alone drive most of the difference in the scorecard grades you will see for each ZIP.

Housing separates these two ZIPs further: median home value sits at $667,100 in 98043 versus $816,400 in 98155, with median rent of $2,004 and $2,127 per month respectively. Homeownership rate is 56.8% vs 70.2%. When reading the comparison table below, focus on paired metrics rather than single winners — a ZIP with lower home values and lower income is not strictly "worse" if rent-to-income ratios and commute times land in the same zone. Every value is pulled from the exact same ACS table so the two columns are genuinely comparable.

Compare different ZIP codes:

vs
Metric
98043
Mountlake Terrace, WA
98155
Seattle, WA
Population 19,943 32,778
Median Household Income $107,687 $131,540
Per Capita Income $59,449 $67,259
Median Age 38.3 40.7
Bachelor's Degree or Higher 42.9% 56.5%
Poverty Rate 7.0% 6.1%
Unemployment Rate 4.2% 4.8%
Median Home Value $667,100 $816,400
Median Rent (monthly) $2,004 $2,127
Homeownership Rate 56.8% 70.2%
Population Density (per sq mi) 1,883 1,675

Values highlighted in green indicate the better metric where applicable. Source: U.S. Census Bureau ACS 2023.

Full Profile
98043
Mountlake Terrace, WA
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98155
Seattle, WA
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What are common questions about this comparison?

How do ZIP codes 98043 and 98155 compare?
ZIP 98043 (Mountlake Terrace, WA) has a population of 19,943 and a median household income of $107,687. ZIP 98155 (Seattle, WA) has a population of 32,778 and a median household income of $131,540.
Which ZIP code has higher income, 98043 or 98155?
ZIP 98155 (Seattle, WA) has a higher median household income of $131,540 compared to $107,687 for ZIP 98043.
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All data sourced from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2023).

PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.

Data sourced from official U.S. Census ACS and HUD-USPS ZIP crosswalk data. See our methodology for details. Retrieved and formatted by PlainZIP Editorial.