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Buchanan County, MO
7 cities and towns and 10 ZIP codes in Buchanan County, Missouri.
Population
83,568
Land area
408sq mi
People per sq mi
205
ZIP codes
10
Cities and towns in Buchanan County
Buchanan County at a glance
- Buchanan County is about 2.3 times as dense as Missouri as a whole.
- By population, it ranks 14th among 115 counties in Missouri.
- The median household income is $62,158, 12% below the Missouri median of $70,702.
- A typical owner-occupied home is valued at $166,300 (28% below Missouri) and median rent is $902 a month.
- Its largest cities are St. Joseph (71,236), Agency (871) and De Kalb (518).
Local data for Buchanan County, MO
Counts from official public data
- Hospitals2
- Emergency Rooms1
- Nursing Homes6
- Schools42
- Colleges1
- Libraries5
- Banks26
- Post Offices5
- Parks29
- Grocery Stores29
- Restaurants252
- Affordable Housing12
- Home Health Agencies3
- Hospice Care3
- Dialysis Centers2
- Rehab & Long-Term Care Hospitals2
- Community Health Centers8
- Mental Health & Addiction Treatment7
- Private Schools8
- Toxic Release Facilities20
- Historic Places45
Housing and community stats
Buchanan County, MO, American Community Survey 2020-2024
Median household income
$62,158
Poverty rate
16.0%
Median home value
$166,300
Prices +6.1% in a year
Median rent
$902/mo
Homeownership
66.3%
Bachelor's or higher
23.9%
Median age
38.9
Average commute
17.8 min
Largest reported origins and ancestries: German Americans (18,762), Irish Americans (9,468), Mexican Americans (3,403).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
4.1%
Aug 2026, -0.4 pts in a year
Average annual pay
$62,044
46,348 jobs, 2025
Income per person
$54,306
BEA, 2024
Federal spending
$506M
FY 2026, $5,968 per person
PPP loans
$147M
1,908 loans, 17,311 jobs reported
Campaign donations
$892K
Itemized, 2026 cycle
How people get to work
Buchanan County, MO, workers 16 and older. American Community Survey 5-year estimates
- Drove alone80.0%
- Carpooled10.2%
- Public transit0.2%
- Walked1.2%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other1.1%
- Worked from home7.3%
Average one-way commute: 17.8 minutes for people who do not work from home.
Environment and hazard risk
Buchanan County, MO, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: hail
Storm events since 1996
538
Most often thunderstorm wind
Flood insurance policies
215
0.7% of homes, county
July high / Jan low
88° / 17°F
34.8 inches of rain a year
Hazards, floods and storm historyCheck a flood zone45 historic places
Health statistics
Share of adults in Buchanan County, MO, CDC PLACES estimates
Obesity
42.9%
U.S. 33.3% +9.6 pts
Diabetes
13.0%
U.S. 12.1% +0.9 pts
Smoking
18.6%
U.S. 12.8% +5.8 pts
Uninsured (18-64)
10.6%
U.S. 11.1% -0.5 pts
Cities, towns and ZIP codes in Buchanan County
Population shown
Frequently asked questions
- What is the largest city in Buchanan County, MO?
- St. Joseph is the largest city or town in Buchanan County, with about 71,236 residents.
- How many ZIP codes are in Buchanan County?
- Buchanan County includes 10 ZIP Code Tabulation Areas, including 64401, 64440, 64443, 64448, 64484.
- What is the population of Buchanan County, MO?
- About 83,568 people live in Buchanan County, based on American Community Survey 5-year estimates.
- What counties border Buchanan County?
- Buchanan County borders Platte County, Clinton County, Andrew County, Atchison County, KS, DeKalb County, Doniphan County, KS.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023