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Washington ZIP Codes
Franklin County
Mesa, WA
99343
99343 ZIP Code — Mesa, WA
Franklin County, Washington
ZIP code 99343 is located in
Mesa ,
Washington ,
within Franklin County .
It covers approximately 180.87 square miles and serves a population of
3,522 residents.
This is a standard ZIP code in the Pacific (PT) timezone,
served by area code 509 .
About ZIP code 99343
The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1970s, giving the area an established character. Owner-occupancy sits near the national average at 66%.
The gap between median ($68,606) and mean household income suggests income inequality — a small number of higher earners pull the average up. Poverty affects 18% of residents, above the national average.
The dominant occupation class is natural resources, construction, and trades, with agriculture and mining as the leading industry. The average commute of 19 minutes is near the national average.
College attainment at 16% is below the national average, consistent with a trades and production-oriented local economy.
26% of residents lack health insurance, above the national average.
Notable community characteristics include Spanish spoken in 33% of households.
Overall, ZIP code 99343 reflects a community defined by a trades-oriented workforce and economic challenges above the national average.
99343 ZIP code map
View map of 99343
Cities in ZIP code 99343
Below are the cities the US Postal Service accepts for ZIP code 99343. Using any city not on this list may result in mail delivery delays.
City
Status
Mesa
Acceptable
Mesa
Preferred
Nearby ZIP codes
Demographics
updated 05/2026
Population
Total population
3,522
Population density
19 / sq mi
State FIPS
53
County FIPS
021
Geography
Land area
180.87 sq mi
Water area
2.97 sq mi
Latitude
46.5599
Longitude
-119.1185
Timezone
Pacific (PT)
Area code
509
Economics
updated 05/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
45.3%
35.5%
31.7%
$50k – $100k
31.1%
33.5%
30.6%
$100k – $200k
21.2%
25.3%
27.1%
Over $200k
2.4%
5.7%
10.6%
Demographics & statistics
$68,606
Median household income
16.3%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 1,289 36.6% 18 and over 2,233 63.4% 65 and over 177 5.0% Median age 22.3 years
Race & ethnicity
American Indian / Alaska Native
0.6%
Group Count % White 2,167 45.1% Hispanic or Latino 1,284 26.7% Other race 837 17.4% Two or more races 471 9.8% American Indian / Alaska Native 30 0.6% Asian 17 0.4%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
45.3%
35.5%
31.7%
$50k – $100k
31.1%
33.5%
30.6%
$100k – $200k
21.2%
25.3%
27.1%
Over $200k
2.4%
5.7%
10.6%
Range % of households Under $10k 0.7% $15k–$25k 6.7% $25k–$35k 2.4% $35k–$50k 4.8% $50k–$75k 37.6% $75k–$100k 8.0% $100k–$150k 23.7% $150k–$200k 7.0% $200k+ 9.1% Median income $68,606
Housing
Housing overview
Metric Value Median home value $0 Median rent / month $917 Owner occupied 65.8% Renter occupied 34.2% Vacant 0.0% Single-family detached 58.9% Large apartment buildings 0.0% Mobile homes 41.1% Median rooms 5.1 Avg household size (owned) 3.91
Year built
Era % 2020 or later 0.0% 2010–2019 3.0% 2000–2009 11.5% 1990–1999 16.8% 1980–1989 3.1% 1970–1979 47.6% 1960–1969 6.8% 1950–1959 9.1% 1940–1949 1.3% 1939 or earlier 0.7%
Bedrooms
Size % of units No bedroom (studio) 0.0% 1 bedroom 0.7% 2 bedrooms 28.8% 3 bedrooms 48.9% 4 bedrooms 16.6% 5+ bedrooms 5.1%
Vehicles per household
Vehicles % of households No vehicle 0.0% 1 vehicle 11.1% 2 vehicles 35.9% 3 or more 53.0%
Heating fuel
Fuel type % Utility gas 0.4% Electricity 95.8% Wood 3.9%
Households & families
Household type Count % Married-couple family 431 52.1% Cohabiting couple 90 10.9% Male householder, no spouse 121 14.6% Female householder, no spouse 185 22.4% Households with children under 18 436 52.7% Households with seniors (65+) 141 17.0% Average household size 4.14
Marital status
Status Male Female Never married 49.8% 41.3% Married 39.3% 30.6% Separated 0.3% 2.3% Widowed 0.9% 15.2% Divorced 9.7% 10.5%
Education
Less than 9th grade
19.1%
Some HS, no diploma
22.7%
Some college, no degree
11.4%
Graduate / professional
6.4%
Metric % HS diploma or higher 58.2% Bachelor's or higher 16.3%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 132 10.8% Kindergarten 96 7.9% Elementary school 532 43.5% High school 268 21.9% College / grad school 194 15.9%
Employment
Industry of employment
Agriculture & mining
46.1%
Education & healthcare
20.1%
Transportation & utilities
6.4%
Arts, food & hospitality
4.5%
Finance & real estate
0.9%
Public administration
0.8%
Professional & management
0.2%
Occupation
Category % Management, business & arts 20.4% Service 11.5% Sales & office 13.3% Natural resources & construction 45.1% Production & transportation 9.7%
Employment type
Type % Private sector 82.1% Government 12.9% Self-employed 3.7% Unpaid family workers 1.3%
Commute
Method % Drive alone 53.9% Carpool 30.3% Public transit 0.0% Walk 3.2% Work from home 12.6% Other means 0.0% Avg commute (minutes) 18.7
Poverty
Married-couple families
0.0%
Female-led households
38.6%
Income support
Source % of households Social Security 25.5% Retirement income 8.9% Supplemental Security 0.0% Cash public assistance 0.4% Food stamps / SNAP 16.1%
Health indicators
Condition % Obesity 40.6% High blood pressure 25.9% High cholesterol 27.5% Diabetes 9.3% Heart disease 5.0% Stroke 2.6% Asthma 10.8% Arthritis 18.9% Kidney disease 2.6% Pulmonary disease 5.6% Cancer 4.2%
Behavior / access % Smoking 16.7% Binge drinking 17.3% No physical activity 25.2% Less than 7 hrs sleep 32.5% Depression 24.2% Fair or poor health 18.7% Poor mental health 17.2% Poor physical health 11.9% No health insurance 26.0% Visited doctor (checkup) 63.9% Visited dentist 56.1% Cholesterol screening 81.0% Teeth loss 18.2%
Veterans & disability
Veterans Count % Civilian veterans 40 1.8%
Disability % Any disability 8.3% Under 18 3.4% 18–64 years 7.2% 65 and over 55.9%
Health insurance coverage
Type % Private insurance 38.6% Public insurance 41.5% No insurance 25.9% Uninsured under 19 4.2%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 3,069 87.1% Spanish 1,025 33.4% Other Indo-European 1,014 33.0% Asian & Pacific Islander 0 0.0% Other languages 11 0.4%
Place of birth & citizenship
Origin Count % Native born (US) 2,047 58.1% Born in same state 2,027 57.6% Born in different state 1,726 49.0% Foreign born 20 0.6% Naturalized citizen 1,475 41.9% Not a US citizen 174 11.8%
Ancestry
Ancestry Count % French 279 7.9% Italian 228 6.5% Arab 23 0.7%
Ancestry Count % Irish 6 0.2% English 6 0.2% Polish 1 0%
Technology access
Metric % of households Computer access 23.5% Internet access 96.1%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 99343
What city is ZIP code 99343 in?
ZIP code 99343 is primarily assigned to Mesa, Washington.
What county is ZIP code 99343 in?
ZIP code 99343 falls within Franklin County, Washington.
Is ZIP code 99343 family-oriented?
37% of residents in ZIP code 99343 are under 18, reflecting a younger, family-oriented community.
Is Spanish widely spoken in ZIP code 99343?
Approximately 33% of households in ZIP code 99343 speak Spanish as a primary language.
What is the poverty rate in ZIP code 99343?
18% of residents in ZIP code 99343 live below the poverty line, above the national average.
What is the population of ZIP code 99343?
ZIP code 99343 has an estimated population of 3,522 residents, with a density of 19 people per square mile.
What timezone is ZIP code 99343 in?
ZIP code 99343 observes the PST timezone.
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