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Washington ZIP Codes
Mason County
Lilliwaup, WA
98555
98555 ZIP Code — Lilliwaup, WA
Mason County, Washington
ZIP code 98555 is located in
Lilliwaup ,
Washington ,
within Mason County .
It covers approximately 26.48 square miles and serves a population of
238 residents.
This is a standard ZIP code in the Pacific (PT) timezone,
served by area code 360/564 .
About ZIP code 98555
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Owner-occupancy is high at 76%, well above the national average.
Median household income is $63,512. Poverty affects 21% of residents, above the national average. SNAP benefit usage at 24% of households reflects economic stress in the area. 94% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. Remote work is prevalent — 65% of workers work from home.
Educational attainment is near the national average, with 31% of residents holding a bachelor's degree or higher.
Notable community characteristics include a notable veteran presence at 24% of civilians, above the national average of 7%.
Overall, ZIP code 98555 reflects a community defined by economic challenges above the national average, a strong veteran community, high homeownership, a high rate of remote workers, a significant Social Security-dependent population, and elevated reliance on food assistance.
98555 ZIP code map
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Cities in ZIP code 98555
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Nearby ZIP codes
Demographics
updated 05/2026
Population
Total population
238
Population density
9 / sq mi
State FIPS
53
County FIPS
045
Geography
Land area
26.48 sq mi
Water area
11.19 sq mi
Latitude
47.5343
Longitude
-123.1827
Timezone
Pacific (PT)
Area code
360/564
Economics
updated 05/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
41.6%
39.4%
31.7%
$50k – $100k
39.8%
34.8%
30.6%
$100k – $200k
18.7%
22.6%
27.1%
Over $200k
0.0%
3.2%
10.6%
Demographics & statistics
$63,512
Median household income
31.1%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 0 0.0% 18 and over 238 100.0% 65 and over 182 76.5% Median age 69.6 years
Race & ethnicity
Group Count % White 200 84% Two or more races 38 16%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
41.6%
39.4%
31.7%
$50k – $100k
39.8%
34.8%
30.6%
$100k – $200k
18.7%
22.6%
27.1%
Over $200k
0.0%
3.2%
10.6%
Range % of households Under $10k 7.5% $10k–$15k 23.6% $50k–$75k 42.2% $150k–$200k 5.6% $200k+ 21.1% Median income $63,512
Housing
Housing overview
Metric Value Median home value $0 Median rent / month $0 Owner occupied 76.4% Renter occupied 23.6% Vacant 78.3% Single-family detached 86.5% Large apartment buildings 0.0% Mobile homes 8.3% Median rooms 4.4 Avg household size (owned) 1.63
Year built
Era % 2020 or later 0.0% 2010–2019 0.0% 2000–2009 16.6% 1990–1999 10.5% 1980–1989 26.8% 1970–1979 12.8% 1960–1969 15.9% 1950–1959 0.0% 1940–1949 1.9% 1939 or earlier 15.6%
Bedrooms
Size % of units No bedroom (studio) 4.2% 1 bedroom 10.6% 2 bedrooms 49.3% 3 bedrooms 35.9% 4 bedrooms 0.0% 5+ bedrooms 0.0%
Vehicles per household
Vehicles % of households No vehicle 0.0% 1 vehicle 52.2% 2 vehicles 24.8% 3 or more 23.0%
Heating fuel
Fuel type % Electricity 69.6% Wood 30.4%
Households & families
Household type Count % Married-couple family 77 47.8% Cohabiting couple 0 0.0% Male householder, no spouse 72 44.7% Female householder, no spouse 12 7.5% Households with children under 18 0 0.0% Households with seniors (65+) 114 70.8% Average household size 1.48
Marital status
Status Male Female Never married 22.7% 0.0% Married 52.0% 86.4% Separated 0.0% 0.0% Widowed 0.0% 13.6% Divorced 25.3% 0.0%
Education
Some HS, no diploma
16.0%
Some college, no degree
13.0%
Graduate / professional
7.6%
Metric % HS diploma or higher 84.0% Bachelor's or higher 31.1%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 0 0.0% Kindergarten 0 0.0% Elementary school 0 0.0% High school 0 0.0% College / grad school 0 0.0%
Employment
Industry of employment
Agriculture & mining
34.9%
Professional & management
20.9%
Education & healthcare
20.9%
Occupation
Category % Management, business & arts 76.7% Service 0.0% Sales & office 23.3% Natural resources & construction 0.0% Production & transportation 0.0%
Employment type
Type % Private sector 23.3% Government 20.9% Self-employed 55.8% Unpaid family workers 0.0%
Commute
Method % Drive alone 34.9% Carpool 0.0% Public transit 0.0% Walk 0.0% Work from home 65.1% Other means 0.0% Avg commute (minutes) 0.0
Poverty
Married-couple families
0.0%
Female-led households
0.0%
Income support
Source % of households Social Security 94.4% Retirement income 50.3% Supplemental Security 13.0% Cash public assistance 0.0% Food stamps / SNAP 23.6%
Health indicators
Condition % Obesity 34.4% High blood pressure 46.4% High cholesterol 43.7% Diabetes 14.9% Heart disease 10.8% Stroke 4.9% Asthma 10.7% Arthritis 39.2% Kidney disease 4.4% Pulmonary disease 10.4% Cancer 10.7%
Behavior / access % Smoking 16.7% Binge drinking 11.3% No physical activity 23.1% Less than 7 hrs sleep 30.6% Depression 25.1% Fair or poor health 19.1% Poor mental health 13.4% Poor physical health 14.5% No health insurance 9.9% Visited doctor (checkup) 77.2% Visited dentist 61.9% Cholesterol screening 93.6% Teeth loss 12.4%
Veterans & disability
Veterans Count % Civilian veterans 56 23.5%
Disability % Any disability 13.9% Under 18 0.0% 18–64 years 0.0% 65 and over 18.1%
Health insurance coverage
Type % Private insurance 48.3% Public insurance 92.4% No insurance 0.0% Uninsured under 19 0.0%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 238 100.0% Spanish 0 0.0% Other Indo-European 0 0.0% Asian & Pacific Islander 0 0.0% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 238 100.0% Born in same state 238 100.0% Born in different state 127 53.4% Foreign born 0 0.0% Naturalized citizen 0 0.0% Not a US citizen 0 0.0%
Ancestry
Ancestry Count % Italian 88 37% French 67 28.2%
Ancestry Count % Polish 21 8.8%
Technology access
Metric % of households Computer access 67.6% Internet access 77.6%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 98555
What city is ZIP code 98555 in?
ZIP code 98555 is primarily assigned to Lilliwaup, Washington.
What county is ZIP code 98555 in?
ZIP code 98555 falls within Mason County, Washington.
Does ZIP code 98555 have an older population?
77% of residents in ZIP code 98555 are 65 or older, above the national average of ~17%.
Does ZIP code 98555 have a large retiree population?
94% of households in ZIP code 98555 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 98555 have a large veteran population?
24% of civilians in ZIP code 98555 are veterans, above the national average of ~7%.
What is the poverty rate in ZIP code 98555?
21% of residents in ZIP code 98555 live below the poverty line, above the national average.
What timezone is ZIP code 98555 in?
ZIP code 98555 observes the PST timezone.
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