County · code 04012
La Paz CountyArizona
La Paz County is a county in Arizona with Parker as its seat. It was created on April 27, 1983, from Yuma County and named after La Paz.
- Founded1983
- County seatParker
- Named forLa Paz, Arizona
- Land area4,497 sq mi + 14 sq mi water
- Population16,557 2020 Census
- Parcels mapped16,130 checked 15 October 2026
Where it is
La Paz on the map of Arizona
Arizona has 15 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1983 from Yuma County
An old deed may name a county that no longer exists, or a boundary that has since moved.
La Paz County was created from Yuma County on April 27, 1983.
- 1983La Paz County created La Paz created from Yuma. · Ariz. Laws 1983, 36th assy., ch. 291/pp. 1089-1094
Land and parcels
What the maps cover in La Paz
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 16,130 parcels from Arizona - AZGEO - Open Data. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 15 October 2026 -
Address points Missing
No public address points layer found for La Paz County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
La Paz by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Inside a city or town, permits usually come from that city rather than the county.
Permits
Zoning and code
GIS and maps
County government
- County government
The official website of La Paz County.
See your own lot on these maps
Open La Paz County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about La Paz County
- When was La Paz County founded?
- La Paz County was founded in 1983, formed from Yuma County, and named after La Paz, Arizona.
- What is the county seat of La Paz County?
- The county seat of La Paz County is Parker.
- Is there an online parcel map for La Paz County?
- Yes. Arizona - AZGEO - Open Data publishes a parcel map of 16,130 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has La Paz County's boundary or name changed?
- La Paz County was created in 1983 from Yuma County. The Atlas of Historical County Boundaries records no boundary change since.
- Who issues building permits in La Paz County?
- The county's page on building permits: ENCROACHMENT PERMIT FEE SCHEDULE. Inside a city or town, ask that city first.
- Who issues septic and well permits in La Paz County?
- The county's page on septic systems and wells: Health department: septic and well.
- Is my lot in a flood zone?
- We do not have flood maps for La Paz County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby