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Idaho ZIP Codes
Washington County
Midvale, ID
83645
83645 ZIP Code — Midvale, ID
Washington County, Idaho
ZIP code 83645 is located in
Midvale ,
Idaho ,
within Washington County .
It covers approximately 416.95 square miles and serves a population of
881 residents.
This is a standard ZIP code in the Mountain (MT) timezone,
served by area code 208 .
About ZIP code 83645
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $286,800. Owner-occupancy is high at 83%, well above the national average.
Median household income is $77,188. Poverty affects 24% of residents, above the national average. 38% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is natural resources, construction, and trades, with public administration as the leading industry. The average commute of 16 minutes is near the national average.
College attainment at 17% is below the national average, consistent with a trades and production-oriented local economy.
Overall, ZIP code 83645 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, high homeownership, and a significant Social Security-dependent population.
83645 ZIP code map
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Cities in ZIP code 83645
Below are the cities the US Postal Service accepts for ZIP code 83645. Using any city not on this list may result in mail delivery delays.
Nearby ZIP codes
Demographics
updated 06/2026
Population
Total population
881
Population density
2 / sq mi
State FIPS
16
County FIPS
087
Geography
Land area
416.95 sq mi
Water area
5.92 sq mi
Latitude
44.3900
Longitude
-116.6313
Timezone
Mountain (MT)
Area code
208
Economics
updated 06/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
46.7%
58.3%
41.8%
$50k – $100k
33.7%
27.9%
34.0%
$100k – $200k
18.1%
11.7%
19.5%
Over $200k
1.6%
2.1%
4.7%
Demographics & statistics
$77,188
Median household income
$286,800
Median home value
16.5%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 207 23.5% 18 and over 674 76.5% 65 and over 201 22.8% Median age 45.8 years
Race & ethnicity
Group Count % White 813 91% Two or more races 63 7.1% Hispanic or Latino 12 1.3% Other race 5 0.6%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
46.7%
58.3%
41.8%
$50k – $100k
33.7%
27.9%
34.0%
$100k – $200k
18.1%
11.7%
19.5%
Over $200k
1.6%
2.1%
4.7%
Range % of households Under $10k 6.8% $10k–$15k 4.2% $15k–$25k 6.5% $25k–$35k 9.1% $35k–$50k 10.4% $50k–$75k 12.0% $75k–$100k 14.2% $100k–$150k 33.3% $150k–$200k 1.0% $200k+ 2.6% Median income $77,188
Housing
Housing overview
Metric Value Median home value $286,800 Median rent / month $639 Owner occupied 83.2% Renter occupied 16.8% Vacant 15.1% Single-family detached 75.0% Large apartment buildings 0.0% Mobile homes 24.2% Median rooms 5.4 Avg household size (owned) 2.93
Year built
Era % 2020 or later 0.5% 2010–2019 3.8% 2000–2009 26.6% 1990–1999 14.3% 1980–1989 3.0% 1970–1979 23.1% 1960–1969 2.2% 1950–1959 2.7% 1940–1949 4.9% 1939 or earlier 18.7%
Bedrooms
Size % of units No bedroom (studio) 5.8% 1 bedroom 6.0% 2 bedrooms 14.6% 3 bedrooms 48.6% 4 bedrooms 18.4% 5+ bedrooms 6.6%
Vehicles per household
Vehicles % of households No vehicle 1.6% 1 vehicle 17.5% 2 vehicles 31.1% 3 or more 49.8%
Heating fuel
Fuel type % Utility gas 0.6% Electricity 42.4% Propane / LP gas 7.8% Fuel oil 6.1% Wood 23.0%
Households & families
Household type Count % Married-couple family 228 73.8% Cohabiting couple 7 2.3% Male householder, no spouse 45 14.6% Female householder, no spouse 29 9.4% Households with children under 18 85 27.5% Households with seniors (65+) 118 38.2% Average household size 2.85
Marital status
Status Male Female Never married 15.9% 22.4% Married 70.7% 66.8% Separated 1.1% 0.8% Widowed 2.0% 4.2% Divorced 10.3% 5.8%
Education
Some college, no degree
26.5%
Graduate / professional
4.8%
Metric % HS diploma or higher 96.0% Bachelor's or higher 16.5%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 12 6.4% Kindergarten 6 3.2% Elementary school 80 42.8% High school 80 42.8% College / grad school 9 4.8%
Employment
Industry of employment
Public administration
21.6%
Education & healthcare
20.1%
Agriculture & mining
18.9%
Arts, food & hospitality
6.6%
Transportation & utilities
4.1%
Professional & management
3.4%
Finance & real estate
1.5%
Occupation
Category % Management, business & arts 26.7% Service 15.0% Sales & office 17.5% Natural resources & construction 32.8% Production & transportation 8.0%
Employment type
Type % Private sector 40.5% Government 38.6% Self-employed 20.9% Unpaid family workers 0.0%
Commute
Method % Drive alone 77.0% Carpool 3.6% Public transit 0.0% Walk 1.5% Work from home 13.5% Other means 4.3% Avg commute (minutes) 16.3
Poverty
Married-couple families
10.5%
Female-led households
85.7%
Income support
Source % of households Social Security 37.5% Retirement income 20.4% Supplemental Security 7.1% Cash public assistance 2.6% Food stamps / SNAP 3.9%
Health indicators
Condition % Obesity 36.7% High blood pressure 41.1% High cholesterol 37.1% Diabetes 14.1% Heart disease 10.1% Stroke 4.6% Asthma 9.9% Arthritis 32.8% Kidney disease 4.1% Pulmonary disease 9.4% Cancer 9.2%
Behavior / access % Smoking 17.1% Binge drinking 12.0% No physical activity 25.0% Less than 7 hrs sleep 28.4% Depression 18.1% Fair or poor health 17.8% Poor mental health 12.6% Poor physical health 13.8% No health insurance 14.2% Visited doctor (checkup) 75.4% Visited dentist 63.0% Cholesterol screening 90.2% Teeth loss 16.1%
Veterans & disability
Veterans Count % Civilian veterans 68 10.1%
Disability % Any disability 14.9% Under 18 0.0% 18–64 years 14.2% 65 and over 31.8%
Health insurance coverage
Type % Private insurance 58.2% Public insurance 40.3% No insurance 12.3% Uninsured under 19 18.2%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 830 94.2% Spanish 16 1.9% Other Indo-European 16 1.9% Asian & Pacific Islander 0 0.0% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 877 99.5% Born in same state 877 99.5% Born in different state 391 44.4% Foreign born 0 0.0% Naturalized citizen 4 0.5% Not a US citizen 3 75.0%
Ancestry
Ancestry Count % French 123 14% Italian 102 11.6% Polish 35 4%
Ancestry Count % Arab 29 3.3% Dutch 15 1.7% English 2 0.2%
Technology access
Metric % of households Computer access 35.1% Internet access 90.3%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 83645
What city is ZIP code 83645 in?
ZIP code 83645 is primarily assigned to Midvale, Idaho.
What county is ZIP code 83645 in?
ZIP code 83645 falls within Washington County, Idaho.
What is the poverty rate in ZIP code 83645?
24% of residents in ZIP code 83645 live below the poverty line, above the national average.
Is ZIP code 83645 mostly owner-occupied?
83% of occupied units in ZIP code 83645 are owner-occupied, well above the national average.
Does ZIP code 83645 have a large retiree population?
38% of households in ZIP code 83645 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 83645 have a large veteran population?
10% of civilians in ZIP code 83645 are veterans, above the national average of ~7%.
What timezone is ZIP code 83645 in?
ZIP code 83645 observes the MST timezone.
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