Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Frequently asked questions
How many ZIP codes are in the St. Joseph, MO-KS metro area?
34 ZIP codes, based on each ZIP code's main county.
Which counties make up the St. Joseph, MO-KS area?
Doniphan County, KS, Andrew County, MO, Buchanan County, MO and DeKalb County, MO.
What is an MSA?
A metropolitan statistical area (MSA) is a core city of 50,000+ people plus the surrounding counties tied to it by commuting, as defined by the U.S. Office of Management and Budget. Micropolitan areas have a core of 10,000–50,000. Together they are called core-based statistical areas (CBSAs).