Buying Land in Yuma County, Arizona

Zoning: a 2006 base ordinance -- confirm current amendments before relying on it

Yuma County's Department of Development Services administers the county's zoning ordinance for unincorporated land, with a Planning & Zoning Division handling zoning enforcement, permitted-use questions, and rezonings under authority set out in Title 11, Chapter 6 of the Arizona Revised Statutes (the same state framework the state hub describes generally). The ordinance's base effective date is September 25, 2006, and it includes a Rural Area (RA) zoning district, addressed in Section 601.00 of the code, aimed at large-lot rural and agricultural land uses, alongside other rural and residential categories.

Unlike a county whose zoning code has been recently and comprehensively rewritten, Yuma County's base ordinance is nearly two decades old as of this page's review, which means individual amendments over that period matter more here for getting an accurate, current picture. Also note that the City of Yuma has its own, separate municipal zoning code -- don't confuse city zoning districts (which use some similarly-named categories) with the county's ordinance if a parcel is near the city's boundary. Confirm the current, amended standard for a specific parcel's zoning district directly with the county's Planning & Zoning Division rather than relying on the 2006 base text alone.

Winter lettuce capital of the world -- and a water system built on the Colorado River, not groundwater

Yuma County's reputation as the "winter lettuce capital of the world" is well-documented, not marketing hyperbole: with more than 350 days of sunshine a year and little risk of hard frost, the county supplies an estimated 90% of the nation's leafy vegetables between November and March, grows more than 175 crops year-round, and its agriculture and agribusiness sectors generate a multi-billion-dollar annual economic contribution to Arizona. This is genuinely different farmland than most of the state's dryland ranching or AMA-groundwater-dependent agriculture -- it runs on irrigation infrastructure delivering Colorado River surface water, not wells.

That water system has its own structure, separate from the AMA groundwater framework the state hub covers (Yuma County sits outside any AMA). The Yuma County Water Users' Association holds a Priority 1 Colorado River right -- among the most senior on the entire river system, meaning it's essentially uncapped and depends on actual crop water need rather than a fixed annual allocation -- while several irrigation districts (Yuma, Welton-Mohawk, North Gila Valley, and Unit B, among others) hold later, Priority 3 rights that are more exposed to Colorado River shortage-driven cuts than the Association's senior right. If you're evaluating agricultural land here, find out specifically which entity delivers water to the parcel and what priority that water right carries -- that distinction matters far more to long-term reliability than the AMA questions that dominate water diligence elsewhere in Arizona. A key structural fact worth knowing up front: these rights are appurtenant to the land's title, not a separable asset -- see the dedicated farm-land page below for what that means in practice.

Two reservations sit inside the county, on a different track entirely

The Cocopah Indian Tribe's reservation (three non-contiguous areas near San Luis) and a limited Arizona-side slice of the Fort Yuma-Quechan Reservation both sit inside Yuma County, entirely outside the fee-land water-rights and zoning framework described above. Cocopah in particular leases irrigated trust farmland to non-Indian farmers with the water right included -- a genuinely different path than buying fee land. See the dedicated tribal-trust-land-status page below for how each reservation's land status and leasing actually work.

Border-wall construction is active and specific to the Yuma Sector right now

Yuma County's borders with both Mexico and California put it inside a Border Patrol sector with genuinely large-scale, currently active federal construction. In September 2025, CBP awarded a contract to Barnard Spencer Joint Venture for roughly 60 miles of detection technology across the Yuma Sector (the "Yuma 1" project). In December 2025, CBP awarded a second contract, to Fisher Sand & Gravel Co., for the "Yuma 2" project -- roughly 31 miles of new primary border wall, about 52 miles of secondary wall, and roughly half a mile of waterborne barrier and associated roads along the Colorado River in Yuma County. A December 2025 DHS waiver was issued to expedite construction under these contracts.

As with any documented federal border-infrastructure activity, this applies to specific, mapped project corridors -- particularly near the international boundary and along the Colorado River -- not the county as a whole, and construction plans, contracts, and federal policy in this area can change. If you're evaluating a parcel near the border or the river in Yuma County, ask directly whether it falls within or near a documented CBP project area, easement, or right-of-way before assuming unrestricted use or resale value.