Pinal County sits between Phoenix and Tucson and has grown faster than almost anywhere in the state, but more than a third of it is state trust land — the largest share of any county we have verified. When trust land nearby is auctioned or annexed, it can reshape the value of private parcels next to it, for better or worse.
Water is the other half of the story. Nearly the whole developed part of the county sits inside the Pinal AMA, where new subdivisions need a 100-year assured water supply, and ADWR has said plainly that native groundwater can no longer support new development there. Individual exempt wells and existing water-company service still matter a great deal; a parcel that already has either is in a different category from one that has neither.
Pinal's GIS is unusually open: its parcel layer reports gross acreage, use code and assessed values for every parcel, and it keeps its own copy of the FEMA flood map. Our research tool reads both.
What the public record says about Pinal County
- County seat and size. Pinal County's seat is Florence. It counted 425,264 residents in the 2020 Census across 5,366.05 square miles of land. Source
- Groundwater designation. Pinal County includes portions of the Pinal, Phoenix and Tucson Active Management Areas. The Pinal AMA alone covers about 4,000 square miles and requires a 100-year assured water supply for new subdivisions. Source
- Who owns the land. Pinal County is 35% state trust land, 26% private, 20% tribal and 19% federal — the highest state-trust share among the counties we have verified. Source
- ADWR on Pinal groundwater. ADWR's director has said that 'the days of utilizing native groundwater for development in Pinal are over.' Source
Water and wells
Pinal County includes portions of the Pinal, Phoenix and Tucson Active Management Areas. The Pinal AMA alone covers about 4,000 square miles and requires a 100-year assured water supply for new subdivisions. Whether a particular parcel is inside a boundary is a map question, not a county question — the parcel research tool checks ADWR's boundary layer for the exact parcel, and the well lookup guide shows how to find any registered well on it.
Land markets we cover in Pinal County
- Casa Grande City of Casa Grande inside city limits; Pinal County outside
County offices for land research
These are the offices that hold the records a buyer, title company or attorney will ask about. Links marked unchecked link point to official county domains we have not yet opened ourselves.
| Assessor | www.pinal.gov unchecked link |
|---|---|
| Parcel search | app1.pinal.gov unchecked link |
| GIS / parcel maps | www.pinal.gov unchecked link |
| Recorder (deeds, easements) | www.pinal.gov unchecked link |
| Treasurer (property tax) | treasurer.pinal.gov unchecked link |
| Planning & zoning | www.pinal.gov unchecked link |
Look up a parcel in Pinal County
Enter an address or assessor parcel number. We pull the parcel record, FEMA flood zone, ADWR water designation and elevation from public sources and label where each one came from.
Sources
- County seat and size — census.gov
- Groundwater designation — azwater.gov
- Who owns the land — wrrc.arizona.edu
- ADWR on Pinal groundwater — azwater.gov
Checked 2026-10-02. Links go to the agency or publication named.
General information, not legal, tax or survey advice. First 48 Offers LLC is a real estate investment company that buys land. It is not a law firm, brokerage, surveyor or title company. Arizona statutes, county procedures and agency boundaries change, and every parcel turns on its own facts. Verify anything important with the county, the agency named, or an Arizona attorney before relying on it.