Missouri Agricultural Zoning and Farm Operations

Missouri's right-to-farm framework, anchored in RSMo 537.295 and Article I, Section 35 of the Missouri Constitution, interacts with local zoning to protect established agricultural operations. Counties retain zoning authority under Chapters 64 and 65, but zoning rules cannot be applied to retroactively bar lawful agricultural operations or to convert them into nuisances after a year of lawful operation. State law also grants animal feeding operations and concentrated animal feeding operations (CAFOs) specific protections through Department of Natural Resources permitting under RSMo Chapter 640, which preempts certain stricter local health rules. Cities and counties may regulate non-agricultural uses, setbacks for new operations, and incompatible land uses, but they must respect statutory and constitutional protections for ongoing farming and ranching activity.

Local zoning that conflicts with state farm protections is subject to legal challenge and may be enjoined. Farms not in lawful operation or violating state permits lose protection and may face zoning enforcement.