PlainZIP

Seattle, WA · standard

ZIP Code 98166

King County, Washington - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

20,301
1,386/sq mi
$114,969
Median income
$824,400
Median home value
46.9%
Bachelor's or higher

The verdict

Seattle pairs an upper-quartile household income with top-decile home values, in a low-density, homeowner-dominated area.

Top 11%
household income, US ZIPs
Top 4%
home value, US ZIPs
1,386
people per sq mi
68%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 98166 against every reporting US ZIP.

ZIP code 98166 is a densely settled ZIP (a standard USPS delivery area) in Seattle, King County, Washington, with 20,301 residents across 14.6 square miles, a density of 1,386 people per square mile, in the Los Angeles time zone.

ZIP 98166 skews affluent, with a median household income of $114,969 (26% above the Washington average), while per-capita income is $66,945. 10.1% of residents live below the poverty line, and the unemployment rate reads 4.8%. The typical home here is valued at $824,400 (61% above the state average); renters pay a median of $1,782 monthly, and 67.9% of units are owner-occupied.

A solid share of residents have a four-year degree: 46.9% of adults hold a bachelor's degree or higher, the median age is 43.6, and the average commute is 29 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 98166, plus 6 more within King County, give a clearer read than the national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 98166

Top 5 sectors by establishment count in Seattle, WA

Which industries have the most business establishments in ZIP 98166.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 98166, Seattle, WA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

20,301

Population

14.6

Area (sq mi)

1,386

People / sq mi

Los Angeles

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 98166?

43.6

Median Age

51.6%

Male

48.4%

Female

14.4%

Foreign-Born

White 68.4%
African American 2.2%
Asian 6.6%
American Indian or Alaska Native 0.4%
Native Hawaiian or Pacific Islander 0.6%
Two or More Ethnicities 10.8%
Hispanic or Latino 14.7%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$114,969

Median Household Income

+26% vs state

$66,945

Per Capita Income

10.1%

Poverty Rate

4.8%

Unemployment Rate

28.5 min

Mean Commute Time

How ZIP 98166 ranks nationally

Seattle, WA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$114,969 Top 11% higher than 89% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 64.8%
Bachelor's Degree or Higher 46.9%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

9,823

Total Housing Units

8,961

Occupied Units

862

Vacant Units

2.45

Avg Household Size

Occupancy Type

Owner 67.9%
Renter 32.1%

$824,400

Median Home Value

+61% vs state

$1,782

Median Rent

1961

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+4.5%

YoY Change (2024)

334

HPI Index (2000 = 100)

+234%

Total Change Since 2000

Home values in ZIP 98166 have increased 4.5% over the past year (2024). Since 2000, this ZIP has seen +234% cumulative appreciation.

Year Annual Change HPI Index
2020 +4.8% 244
2021 +10.7% 270
2022 +14.6% 310
2023 +3.4% 320
2024 +4.5% 334

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 740 business establishments in ZIP 98166, employing approximately 6,025 people with a combined annual payroll of $323,112,000.

740

Businesses

6,025

Employees

$323.1M

Annual Payroll

15

Industry Sectors

Industry Establishments % of Total
Health care and social assistance 131 17.7%
Professional, scientific, and technical services 97 13.1%
Construction 82 11.1%
Accommodation and food services 82 11.1%
Other services (except public administration) 76 10.3%
Retail trade 67 9.1%
Real estate and rental and leasing 47 6.3%
Finance and insurance 33 4.5%
Administrative and support and waste management and remediation services 31 4.2%
Educational services 18 2.4%
Arts, entertainment, and recreation 18 2.4%
Wholesale trade 17 2.3%
Manufacturing 14 1.9%
Transportation and warehousing 12 1.6%
Information 10 1.4%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 98166 vs 98148 →

ZIP 98166 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 98166 ranks #8 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 98166 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 98166 ranks #4 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
98148 Seattle, WA 10,010 1.3 mi
98158 Seattle, WA 0 2.0 mi
98146 Seattle, WA 25,922 3.3 mi
98188 Seattle, WA 23,111 3.6 mi
98168 Seattle, WA 33,734 3.4 mi
98106 Seattle, WA 22,873 6.3 mi
98198 Seattle, WA 34,584 4.4 mi
98126 Seattle, WA 20,698 6.7 mi
98136 Seattle, WA 14,770 6.1 mi
98108 Seattle, WA 22,374 6.4 mi

More ZIP Codes in King County

98052 standard
Redmond, WA
Pop: 58,442
98023 standard
Federal Way, WA
Pop: 47,510
98115 standard
Seattle, WA
Pop: 46,206
98103 standard
Seattle, WA
Pop: 45,911
98133 standard
Seattle, WA
Pop: 44,555
98003 standard
Federal Way, WA
Pop: 44,151

Related Areas

King County Seattle, WA Washington

Frequently Asked Questions

What county is ZIP code 98166 in? ▼
ZIP code 98166 (Seattle) is located in King County, Washington. King County contains multiple ZIP codes, see the full list at /counties/king-wa.
What is the population of ZIP code 98166? ▼
ZIP code 98166 in Seattle, WA has a population of 20,301 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 98166? ▼
The median household income in ZIP 98166 is $114,969, which is 51% above the national average of $76,288.
What is the average home value in ZIP 98166? ▼
The median home value in ZIP 98166 is $824,400, which is 196% above the national average of $278,155.
What is the demographic makeup of ZIP 98166? ▼
The largest racial group in ZIP 98166 is White at 68.4%. Hispanic or Latino residents make up 14.7% of the population.
How many businesses are in ZIP code 98166? ▼
ZIP code 98166 has 740 business establishments employing approximately 6,025 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 98166? ▼
The top industries by establishment count in ZIP 98166 are: Health care and social assistance (131), Professional, scientific, and technical services (97), Construction (82). There are 15 industry sectors represented in total.
How have home values changed in ZIP code 98166? ▼
According to the FHFA House Price Index, home values in ZIP 98166 increased by 4.5% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 234%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 98166? ▼
In ZIP code 98166, 64.8% of residents aged 25+ have a high school diploma or higher, and 46.9% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 98166? ▼
The mean commute time for workers in ZIP code 98166 is 28.5 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 98166? ▼
In ZIP code 98166, approximately 67.9% of occupied housing units are owner-occupied and 32.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 98166? ▼
The poverty rate in ZIP code 98166 is 10.1% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.